原生JavaScript技巧大收集

1、原生JavaScript实现字符串长度截取

function cutstr(str, len) {

    var temp;

    var icount = 0;

    var patrn = /[^\x00-\xff]/;

    var strre = "";

    for (var i = 0; i < str.length; i++) {

        if (icount < len - 1) {

            temp = str.substr(i, 1);

            if (patrn.exec(temp) == null) {

                icount = icount + 1

            } else {

                icount = icount + 2

            }

            strre += temp

        } else {

            break

        }

    }

    return strre + "..."

}

2、原生JavaScript获取域名主机

function getHost(url) {

    var host = "null";

    if(typeof url == "undefined"|| null == url) {

        url = window.location.href;

    }

    var regex = /^\w+\:\/\/([^\/]*).*/;

    var match = url.match(regex);

    if(typeof match != "undefined" && null != match) {

        host = match[1];

    }

    return host;

}

3、原生JavaScript清除空格

String.prototype.trim = function() {

    var reExtraSpace = /^\s*(.*?)\s+$/;

    return this.replace(reExtraSpace, "$1")

}

4、原生JavaScript替换全部

String.prototype.replaceAll = function(s1, s2) {

    return this.replace(new RegExp(s1, "gm"), s2)

}

5、原生JavaScript转义html标签

function HtmlEncode(text) {

    return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')

}

6、原生JavaScript还原html标签

function HtmlDecode(text) {

    return text.replace(/&/g, '&').replace(/"/g, '\"').replace(/</g, '<').replace(/>/g, '>')

}

7、原生JavaScript时间日期格式转换

Date.prototype.Format = function(formatStr) {

    var str = formatStr;

    var Week = ['日', '一', '二', '三', '四', '五', '六'];

    str = str.replace(/yyyy|YYYY/, this.getFullYear());

    str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));

    str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));

    str = str.replace(/M/g, (this.getMonth() + 1));

    str = str.replace(/w|W/g, Week[this.getDay()]);

    str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());

    str = str.replace(/d|D/g, this.getDate());

    str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());

    str = str.replace(/h|H/g, this.getHours());

    str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());

    str = str.replace(/m/g, this.getMinutes());

    str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());

    str = str.replace(/s|S/g, this.getSeconds());

    return str

}

8、原生JavaScript判断是否为数字类型

function isDigit(value) {

    var patrn = /^[0-9]*$/;

    if (patrn.exec(value) == null || value == "") {

        return false

    } else {

        return true

    }

}

9、原生JavaScript设置cookie值

function setCookie(name, value, Hours) {

    var d = new Date();

    var offset = 8;

    var utc = d.getTime() + (d.getTimezoneOffset() * 60000);

    var nd = utc + (3600000 * offset);

    var exp = new Date(nd);

    exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);

    document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"

}

10、原生JavaScript获取cookie值

function getCookie(name) {

    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));

    if (arr != null) return unescape(arr[2]);

    return null

}

11、原生JavaScript加入收藏夹

function AddFavorite(sURL, sTitle) {

    try {

        window.external.addFavorite(sURL, sTitle)

    } catch(e) {

        try {

            window.sidebar.addPanel(sTitle, sURL, "")

        } catch(e) {

            alert("加入收藏失败，请使用Ctrl+D进行添加")

        }

    }

}

12、原生JavaScript设为首页

function setHomepage() {

    if (document.all) {

        document.body.style.behavior = 'url(#default#homepage)';

        document.body.setHomePage('http://www.jq-school.com')

    } else if (window.sidebar) {

        if (window.netscape) {

            try {

                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")

            } catch(e) {

                alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")

            }

        }

        var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);

        prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com')

    }

}

13、原生JavaScript判断IE6

var ua = navigator.userAgent.toLowerCase();

var isIE6 = ua.indexOf("msie 6") > -1;

if (isIE6) {

    try {

        document.execCommand("BackgroundImageCache", false, true)

    } catch(e) {}

}

14、原生JavaScript加载样式文件

function LoadStyle(url) {

    try {

        document.createStyleSheet(url)

    } catch(e) {

        var cssLink = document.createElement('link');

        cssLink.rel = 'stylesheet';

        cssLink.type = 'text/css';

        cssLink.href = url;

        var head = document.getElementsByTagName('head')[0];

        head.appendChild(cssLink)

    }

}

15、原生JavaScript返回脚本内容

function evalscript(s) {

        if(s.indexOf('<script') == -1) return s;

        var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;

        var arr = [];

        while(arr = p.exec(s)) {

                var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;

                var arr1 = [];

                arr1 = p1.exec(arr[0]);

                if(arr1) {

                        appendscript(arr1[1], '', arr1[2], arr1[3]);

                } else {

                        p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;

                        arr1 = p1.exec(arr[0]);

                        appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);

                }

        }

        return s;

}

16、原生JavaScript清除脚本内容

function stripscript(s) {

        return s.replace(/<script.*?>.*?<\/script>/ig, '');

}

17、原生JavaScript动态加载脚本文件

function appendscript(src, text, reload, charset) {

        var id = hash(src + text);

        if(!reload && in_array(id, evalscripts)) return;

        if(reload && $(id)) {

                $(id).parentNode.removeChild($(id));

        }

 

        evalscripts.push(id);

        var scriptNode = document.createElement("script");

        scriptNode.type = "text/javascript";

        scriptNode.id = id;

        scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);

        try {

                if(src) {

                        scriptNode.src = src;

                        scriptNode.onloadDone = false;

                        scriptNode.onload = function () {

                                scriptNode.onloadDone = true;

                                JSLOADED[src] = 1;

                        };

                        scriptNode.onreadystatechange = function () {

                                if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) {

                                        scriptNode.onloadDone = true;

                                        JSLOADED[src] = 1;

                                }

                        };

                } else if(text){

                        scriptNode.text = text;

                }

                document.getElementsByTagName('head')[0].appendChild(scriptNode);

        } catch(e) {}

}

18、原生JavaScript返回按ID检索的元素对象

function $(id) {

        return !id ? null : document.getElementById(id);

}

19、原生JavaScript返回浏览器版本内容

function browserVersion(types) {

        var other = 1;

        for(i in types) {

                var v = types<i> ? types<i> : i;

                if(USERAGENT.indexOf(v) != -1) {

                        var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');

                        var matches = re.exec(USERAGENT);

                        var ver = matches != null ? matches[2] : 0;

                        other = ver !== 0 && v != 'mozilla' ? 0 : other;

                }else {

                        var ver = 0;

                }

                eval('BROWSER.' + i + '= ver');

        }

        BROWSER.other = other;

}

20、原生JavaScript元素显示的通用方法

function $(id) {

        return !id ? null : document.getElementById(id);

}

function display(id) {

        var obj = $(id);

        if(obj.style.visibility) {

                obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';

        } else {

                obj.style.display = obj.style.display == '' ? 'none' : '';

        }

}

21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现

function insertAfter(newChild,refChild){

        var parElem=refChild.parentNode;

        if(parElem.lastChild==refChild){

                refChild.appendChild(newChild);

        }else{

                parElem.insertBefore(newChild,refChild.nextSibling);

        }

} 

22、原生JavaScript中兼容浏览器绑定元素事件

function addEventSamp(obj,evt,fn){

        if (obj.addEventListener) {

                obj.addEventListener(evt, fn, false);

        }else if(obj.attachEvent){

                obj.attachEvent('on'+evt,fn);

        }

}

23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用

function focusLast(){

        var e = event.srcElement;

        var r =e.createTextRange();

        r.moveStart('character',e.value.length);

        r.collapse(true);

        r.select();

}

24、原生JavaScript检验URL链接是否有效

function getUrlState(URL){

        var xmlhttp = new ActiveXObject("microsoft.xmlhttp");

        xmlhttp.Open("GET",URL, false); 

        try{ 

                xmlhttp.Send();

        }catch(e){

        }finally{

                var result = xmlhttp.responseText;

                if(result){

                        if(xmlhttp.Status==200){

                                return(true);

                        }else{

                                return(false);

                        }

                }else{

                        return(false);

                }

        }

}

25、原生JavaScript格式化CSS样式代码

function formatCss(s){//格式化代码

        s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");

        s = s.replace(/;\s*;/g, ";"); //清除连续分号

        s = s.replace(/\,[\s\.\#\d]*{/g, "{");

        s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");

        s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");

        s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");

        return s;

}

26、原生JavaScript压缩CSS样式代码

function yasuoCss (s) {//压缩代码

        s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释

        s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");

        s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理

        s = s.replace(/;\s*;/g, ";"); //清除连续分号

        s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白

        return (s == null) ? "" : s[1];

}

27、原生JavaScript获取当前路径

var currentPageUrl = "";

if (typeof this.href === "undefined") {

    currentPageUrl = document.location.toString().toLowerCase();

}

else {

    currentPageUrl = this.href.toString().toLowerCase();

}

28、原生JavaScriptIP转成整型

function _ip2int(ip){

    var num = 0;

    ip = ip.split(".");

    num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);

    num = num >>> 0;

    return num;

}

29、原生JavaScript整型解析为IP地址

function _int2iP(num){

    var str;

    var tt = new Array();

    tt[0] = (num >>> 24) >>> 0;

    tt[1] = ((num << 8) >>> 24) >>> 0;

    tt[2] = (num << 16) >>> 24;

    tt[3] = (num << 24) >>> 24;

    str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);

    return str;

}

30、原生JavaScript实现checkbox全选与全不选

function checkAll() {

        var selectall = document.getElementById("selectall");

        var allbox = document.getElementsByName("allbox");

        if (selectall.checked) {

                for (var i = 0; i < allbox.length; i++) {

                        allbox.checked = true;

                }

        } else {

                for (var i = 0; i < allbox.length; i++) {

                        allbox.checked = false;

                }

        }

}

31、原生]JavaScript判断是否移动设备

function isMobile(){

        if (typeof this._isMobile === 'boolean'){

                return this._isMobile;

        }

        var screenWidth = this.getScreenWidth();

        var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

        var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");

        if(!fixViewPortsExperiment){

                if(!this.isAppleMobileDevice()){

                        screenWidth = screenWidth/window.devicePixelRatio;

                }

        }

        var isMobileScreenSize = screenWidth < 600;

        var isMobileUserAgent = false;

        this._isMobile = isMobileScreenSize && this.isTouchScreen();

        return this._isMobile;

}

32、原生JavaScript判断是否移动设备访问

function isAppleMobileDevice(){

        return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));

}

33、原生JavaScript判断是否苹果移动设备访问

function isAppleMobileDevice(){

        return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));

}

34、原生JavaScript判断是否安卓移动设备访问

function isAndroidMobileDevice(){

        return (/android/i.test(navigator.userAgent.toLowerCase()));

}

35、原生JavaScript判断是否Touch屏幕

function isTouchScreen(){

        return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);

}

36、原生JavaScript判断是否在安卓上的谷歌浏览器

function isNewChromeOnAndroid(){

        if(this.isAndroidMobileDevice()){

                var userAgent = navigator.userAgent.toLowerCase();

                if((/chrome/i.test(userAgent))){

                        var parts = userAgent.split('chrome/');

                        var fullVersionString = parts[1].split(" ")[0];

                        var versionString = fullVersionString.split('.')[0];

                        var version = parseInt(versionString);

                        if(version >= 27){

                                return true;

                        }

                }

        }

        return false;

}

37、原生JavaScript判断是否打开视窗

function isViewportOpen() {

        return !!document.getElementById('wixMobileViewport');

}

38、原生JavaScript获取移动设备初始化大小

function getInitZoom(){

        if(!this._initZoom){

                var screenWidth = Math.min(screen.height, screen.width);

                if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

                        screenWidth = screenWidth/window.devicePixelRatio;

                }

                this._initZoom = screenWidth /document.body.offsetWidth;

        }

        return this._initZoom;

}

39、原生JavaScript获取移动设备最大化大小

function getZoom(){

        var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);

        if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

                screenWidth = screenWidth/window.devicePixelRatio;

        }

        var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

        var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");

        if(FixViewPortsExperimentRunning){

                return screenWidth / window.innerWidth;

        }else{

                return screenWidth / document.body.offsetWidth;

        }

}

40、原生JavaScript获取移动设备屏幕宽度

function getScreenWidth(){

        var smallerSide = Math.min(screen.width, screen.height);

        var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;

        var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");

        if(fixViewPortsExperiment){

                if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){

                        smallerSide = smallerSide/window.devicePixelRatio;

                }

        }

        return smallerSide;

}

41、原生JavaScript完美判断是否为网址

function IsURL(strUrl) {

    var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i

    if (regular.test(strUrl)) {

        return true;

    }

    else {

        return false;

    }

}

42、原生JavaScript根据样式名称检索元素对象

function getElementsByClassName(name) {

    var tags = document.getElementsByTagName('*') || document.all;

    var els = [];

    for (var i = 0; i < tags.length; i++) {

        if (tags.className) {

            var cs = tags.className.split(' ');

            for (var j = 0; j < cs.length; j++) {

                if (name == cs[j]) {

                    els.push(tags);

                    break

                }

            }

        }

    }

    return els

}

43、原生JavaScript判断是否以某个字符串开头

String.prototype.startWith = function (s) {

    return this.indexOf(s) == 0

}

44、原生JavaScript判断是否以某个字符串结束

String.prototype.endWith = function (s) {

    var d = this.length - s.length;

    return (d >= 0 && this.lastIndexOf(s) == d)

}

45、原生JavaScript返回IE浏览器的版本号

function getIE(){

    if (window.ActiveXObject){

        var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];

        return parseFloat(v.substring(0, v.indexOf(".")))

    }

    return false

}

46、原生JavaScript获取页面高度

function getPageHeight(){

        var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"

                        ? a

                        : g.documentElement;

        return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);

}

47、原生JavaScript获取页面scrollLeft

function getPageScrollLeft(){

        var a = document;

        return a.documentElement.scrollLeft || a.body.scrollLeft;

}

48、原生JavaScript获取页面可视宽度

function getPageViewWidth(){

        var d = document, a = d.compatMode == "BackCompat"

                        ? d.body

                        : d.documentElement;

        return a.clientWidth;

}

49、原生JavaScript获取页面宽度

function getPageWidth(){

        var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"

                        ? a

                        : g.documentElement;

        return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);

}

50、原生JavaScript获取页面scrollTop

function getPageScrollTop(){

        var a = document;

        return a.documentElement.scrollTop || a.body.scrollTop;

}

51、原生JavaScript获取页面可视高度

function getPageViewHeight() {

        var d = document, a = d.compatMode == "BackCompat"

                        ? d.body

                        : d.documentElement;

        return a.clientHeight;

}

52、原生JavaScript跨浏览器添加事件

function addEvt(oTarget,sEvtType,fnHandle){

        if(!oTarget){return;}

        if(oTarget.addEventListener){

                oTarget.addEventListener(sEvtType,fnHandle,false);

        }else if(oTarget.attachEvent){

                oTarget.attachEvent("on" + sEvtType,fnHandle);

        }else{

                oTarget["on" + sEvtType] = fnHandle;

        }

}

53、原生JavaScript跨浏览器删除事件

function delEvt(oTarget,sEvtType,fnHandle){

        if(!oTarget){return;}

        if(oTarget.addEventListener){

                oTarget.addEventListener(sEvtType,fnHandle,false);

        }else if(oTarget.attachEvent){

                oTarget.attachEvent("on" + sEvtType,fnHandle);

        }else{

                oTarget["on" + sEvtType] = fnHandle;

        }

}

54、原生JavaScript去掉url前缀

function removeUrlPrefix(a){

  a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/");

  while(trim(a).toLowerCase().indexOf("http://")==0){

    a=trim(a.replace(/http:\/\//i,""));

  }

  return a;

}

55、原生JavaScript随机数时间戳

function uniqueId(){

        var a=Math.random,b=parseInt;

        return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());

}

56、原生JavaScript全角半角转换,iCase: 0全到半，1半到全，其他不转化

function chgCase(sStr,iCase){

        if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){

                return sStr;

        }

        var i,oRs=[],iCode;

        if(iCase){/*半->全*/

                for(i=0; i<sStr.length;i+=1){

                        iCode = sStr.charCodeAt(i);

                        if(iCode == 32){

                                iCode = 12288;                               

                        }else if(iCode < 127){

                                iCode += 65248;

                        }

                        oRs.push(String.fromCharCode(iCode));

                }               

        }else{/*全->半*/

                for(i=0; i<sStr.length;i+=1){

                        iCode = sStr.charCodeAt(i);

                        if(iCode == 12288){

                                iCode = 32;

                        }else if(iCode > 65280 && iCode < 65375){

                                iCode -= 65248;                               

                        }

                        oRs.push(String.fromCharCode(iCode));

                }               

        }               

        return oRs.join("");               

}

57、原生JavaScript确认是否键盘有效输入值

function checkKey(iKey){

        if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/

        if(iKey>47 && iKey < 58){return true;}/*数字*/

        if(iKey>64 && iKey < 91){return true;}/*字母*/

        if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/

        if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/

        if(iKey>185 && iKey < 193){return true;}/*符号1*/

        if(iKey>218 && iKey < 223){return true;}/*符号2*/

        return false;

}

58、原生JavaScript获取网页被卷去的位置

function getScrollXY() {

    return document.body.scrollTop ? {

        x: document.body.scrollLeft,

        y: document.body.scrollTop

    }: {

        x: document.documentElement.scrollLeft,

        y: document.documentElement.scrollTop

    }

}

59、原生JavaScript另一种正则日期格式化函数+调用方法

Date.prototype.format = function(format){ //author: meizz

  var o = {

    "M+" : this.getMonth()+1, //month

    "d+" : this.getDate(),    //day

    "h+" : this.getHours(),   //hour

    "m+" : this.getMinutes(), //minute

    "s+" : this.getSeconds(), //second

    "q+" : Math.floor((this.getMonth()+3)/3),  //quarter

    "S" : this.getMilliseconds() //millisecond

  }

  if(/(y+)/.test(format)) format=format.replace(RegExp.$1,

    (this.getFullYear()+"").substr(4 - RegExp.$1.length));

  for(var k in o)if(new RegExp("("+ k +")").test(format))

    format = format.replace(RegExp.$1,

      RegExp.$1.length==1 ? o[k] :

        ("00"+ o[k]).substr((""+ o[k]).length));

  return format;

}

alert(new Date().format("yyyy-MM-dd hh:mm:ss"));

60、原生JavaScript时间个性化输出功能

/*

1、< 60s, 显示为“刚刚”

2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”

3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”

4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”

5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”

*/

function timeFormat(time){

  var date = new Date(time)

    , curDate = new Date()

    , year = date.getFullYear()

    , month = date.getMonth() + 1

    , day = date.getDate()

    , hour = date.getHours()

    , minute = date.getMinutes()

    , curYear = curDate.getFullYear()

    , curHour = curDate.getHours()

    , timeStr;

 

  if(year < curYear){

    timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute;

  }else{

    var pastTime = curDate - date

      , pastH = pastTime/3600000;

 

    if(pastH > curHour){

      timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;

    }else if(pastH >= 1){

      timeStr = '今天 ' + hour +':'+ minute +'分';

    }else{

      var pastM = curDate.getMinutes() - minute;

      if(pastM > 1){

        timeStr = pastM +'分钟前';

      }else{

        timeStr = '刚刚';

      }

    }

  }

  return timeStr;

}

61、原生JavaScript解决offsetX兼容性问题

// 针对火狐不支持offsetX/Y

function getOffset(e){

  var target = e.target, // 当前触发的目标对象

      eventCoord,

      pageCoord,

      offsetCoord;

 

  // 计算当前触发元素到文档的距离

  pageCoord = getPageCoord(target);

 

  // 计算光标到文档的距离

  eventCoord = {

    X : window.pageXOffset + e.clientX,

    Y : window.pageYOffset + e.clientY

  };

 

  // 相减获取光标到第一个定位的父元素的坐标

  offsetCoord = {

    X : eventCoord.X - pageCoord.X,

    Y : eventCoord.Y - pageCoord.Y

  };

  return offsetCoord;

}

 

function getPageCoord(element){

  var coord = { X : 0, Y : 0 };

  // 计算从当前触发元素到根节点为止，

  // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和

  while (element){

    coord.X += element.offsetLeft;

    coord.Y += element.offsetTop;

    element = element.offsetParent;

  }

  return coord;

}

62、原生JavaScript常用的正则表达式

//正整数

/^[0-9]*[1-9][0-9]*$/;

//负整数

/^-[0-9]*[1-9][0-9]*$/;

//正浮点数

/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;  

//负浮点数

/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; 

//浮点数

/^(-?\d+)(\.\d+)?$/;

//email地址

/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;

//url地址

/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;

//年/月/日（年-月-日、年.月.日）

/^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;

//匹配中文字符

/[\u4e00-\u9fa5]/;

//匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)

/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;

//匹配空白行的正则表达式

/\n\s*\r/;

//匹配中国邮政编码

/[1-9]\d{5}(?!\d)/;

//匹配身份证

/\d{15}|\d{18}/;

//匹配国内电话号码

/(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;

//匹配IP地址

/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;

//匹配首尾空白字符的正则表达式

/^\s*|\s*$/;

//匹配HTML标记的正则表达式

< (\S*?)[^>]*>.*?|< .*? />;

63、原生JavaScript实现返回顶部的通用方法

function backTop(btnId) {

        var btn = document.getElementById(btnId);

        var d = document.documentElement;

        var b = document.body;

        window.onscroll = set;

        btn.style.display = "none";

        btn.onclick = function() {

                btn.style.display = "none";

                window.onscroll = null;

                this.timer = setInterval(function() {

                        d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);

                        b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);

                        if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);

                },

                10);

        };

        function set() {

                btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"

        }

};

backTop('goTop');

64、原生JavaScript获得URL中GET参数值

// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]

function get_get(){

  querystr = window.location.href.split("?")

  if(querystr[1]){

    GETs = querystr[1].split("&")

    GET =new Array()

    for(i=0;i<GETs.length;i++){

      tmp_arr = GETs.split("=")

      key=tmp_arr[0]

      GET[key] = tmp_arr[1]

    }

  }

  return querystr[1];

}

65、原生JavaScript实现全选通用方法

function checkall(form, prefix, checkall) {

        var checkall = checkall ? checkall : 'chkall';

        for(var i = 0; i < form.elements.length; i++) {

                var e = form.elements;

                if(e.type=="checkbox"){

                        e.checked = form.elements[checkall].checked;

                }

        }

}

66、原生JavaScript实现全部取消选择通用方法

function uncheckAll(form) {

        for (var i=0;i<form.elements.length;i++){

                var e = form.elements;

                if (e.name != 'chkall')

                e.checked=!e.checked;

        }

}

67、原生JavaScript实现打开一个窗体通用方法

function openWindow(url,windowName,width,height){

    var x = parseInt(screen.width / 2.0) - (width / 2.0);

    var y = parseInt(screen.height / 2.0) - (height / 2.0);

    var isMSIE= (navigator.appName == "Microsoft Internet Explorer");

    if (isMSIE) {

            var p = "resizable=1,location=no,scrollbars=no,width=";

            p = p+width;

            p = p+",height=";

            p = p+height;

            p = p+",left=";

            p = p+x;

            p = p+",top=";

            p = p+y;

        retval = window.open(url, windowName, p);

    } else {

        var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" );

        eval("try { win.resizeTo(width, height); } catch(e) { }");

        win.focus();

    }

}

68、原生JavaScript判断是否为客户端设备

function client(o){       

       var b = navigator.userAgent.toLowerCase();  

           var t = false;

           if (o == 'isOP'){

                         t = b.indexOf('opera') > -1;

           }

           if (o == 'isIE'){

                         t = b.indexOf('msie') > -1;

           }

           if (o == 'isFF'){

                         t = b.indexOf('firefox') > -1;

           }

       return t;

}

69、原生JavaScript获取单选按钮的值

function get_radio_value(field){

        if(field&&field.length){       

                for(var i=0;i<field.length;i++){               

                        if(field.checked){                       

                                return field.value;                                                               

                        }                       

                }               

        }else {               

                return ;                               

        }       

}

70、原生JavaScript获取复选框的值

function get_checkbox_value(field){       

        if(field&&field.length){       

                for(var i=0;i<field.length;i++){                       

                        if(field.checked && !field.disabled){

                                return field.value;

                        }

                }               

        }else {

                return;

        }                       

}

71、原生JavaScript判断是否为邮箱

function isEmail(str){

    var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;

        if (re.test(str) != true) {

                return false;

        }else{

                return true;

        }       

}

72、原生JavaScript判断是否有列表中的危险字符

function isValidReg(chars){

        var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;

        if (re.test( chars) == true) {

                return false;

        }else{

                return true;

        }       

}

73、原生JavaScript判断字符串是否大于规定的长度

function isValidLength(chars, len) {

        if (chars.length < len) {

                return false;

        }

        return true;

}

74、原生JavaScript判断字符串是为网址不区分大小写

function isValidURL( chars ) {

        var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;

        if (!isNULL(chars)) {

                chars = jsTrim(chars);

                if (chars.match(re) == null)

                        return false;

                else

                        return true;

        }

        return false;

}

75、原生JavaScript判断字符串是否为小数

function isValidDecimal( chars ) {

        var re=/^\d*\.?\d{1,2}$/;

        if (chars.match(re) == null)

                return false;

        else

                return true;

}

76、原生JavaScript判断字符串是否为整数

function isNumber( chars ) {

        var re=/^\d*$/;

        if (chars.match(re) == null)

                return false;

        else

                return true;

}

77、原生JavaScript判断字符串是否为浮点数

function isFloat( str ) {

        for(i=0;i<str.length;i++)  {

           if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){

                        return false;

           }

        }

        return true;

}

78、原生JavaScript判断字符是否为A-Za-z英文字母

function isLetters( str ){

        var re=/^[A-Za-z]+$/;

        if (str.match(re) == null)

                return false;

        else

                return true;

}

79、原生JavaScript判断字符串是否邮政编码

function isValidPost( chars ) {

        var re=/^\d{6}$/;

        if (chars.match(re) == null)

                return false;

        else

                return true;

}

80、原生JavaScript判断字符是否空NULL

function isNULL( chars ) {

        if (chars == null)

                return true;

        if (jsTrim(chars).length==0)

                return true;

        return false;

}

81、原生JavaScript用正则表达式提取页面代码中所有网址

var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");

alert(aa)

82、原生JavaScript用正则表达式清除相同的数组(低效率)

Array.prototype.unique=function(){

        return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();

};

83、原生JavaScript用正则表达式清除相同的数组(高效率)

String.prototype.unique=function(){

        var x=this.split(/[\r\n]+/);

        var y='';

        for(var i=0;i<x.length;i++){

                if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"[        DISCUZ_CODE_2        ]quot;,"igm").test(y)){

                        y+=x+"\r\n"

                }

        }

        return y

};

84、原生JavaScript用正则表达式按字母排序，对每行进行数组排序

function SetSort(){

        var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序

        var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序

        K1.value=K1.value!=text?text:test;

}

85、原生JavaScript字符串反序

function IsReverse(text){

        return text.split('').reverse().join('');

}

86、原生JavaScript用正则表达式清除html代码中的脚本

function clear_script(){

  K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");

}

87、原生JavaScript动态执行JavaScript脚本

function javascript(){

        try{

          eval(K1.value);

        }catch(e){

                alert(e.message);

        }

}

88、原生JavaScript动态执行VBScript脚本

function vbscript(){

        try{

                var script=document.getElementById("K1").value;

                if(script.trim()=="")return;

                window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript")

        }catch(e){

                alert(e.message);

        }

}

89、原生JavaScript实现金额大写转换函数

function transform(tranvalue) {

  try {

    var i = 1;

    var dw2 = new Array("", "万", "亿"); //大单位

    var dw1 = new Array("拾", "佰", "仟"); //小单位

    var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用

    //以下是小写转换成大写显示在合计大写的文本框中    

    //分离整数与小数

    var source = splits(tranvalue);

    var num = source[0];

    var dig = source[1];

    //转换整数部分

    var k1 = 0; //计小单位

    var k2 = 0; //计大单位

    var sum = 0;

    var str = "";

    var len = source[0].length; //整数的长度

    for (i = 1; i <= len; i++) {

      var n = source[0].charAt(len - i); //取得某个位数上的数字

      var bn = 0;

      if (len - i - 1 >= 0) {

        bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字

      }

      sum = sum + Number(n);

      if (sum != 0) {

        str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面

        if (n == '0') sum = 0;

      }

      if (len - i - 1 >= 0) { //在数字范围内

        if (k1 != 3) { //加小单位

          if (bn != 0) {

            str = dw1[k1].concat(str);

          }

          k1++;

        } else { //不加小单位，加大单位

          k1 = 0;

          var temp = str.charAt(0);

          if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位

          str = str.substr(1, str.length - 1);

          str = dw2[k2].concat(str);

          sum = 0;

        }

      }

      if (k1 == 3) //小单位到千则大单位进一

      {

        k2++;

      }

    }

    //转换小数部分

    var strdig = "";

    if (dig != "") {

      var n = dig.charAt(0);

      if (n != 0) {

        strdig += dw[Number(n)] + "角"; //加数字

      }

      var n = dig.charAt(1);

      if (n != 0) {

        strdig += dw[Number(n)] + "分"; //加数字

      }

    }

    str += "元" + strdig;

  } catch(e) {

    return "0元";

  }

  return str;

}

//拆分整数与小数

function splits(tranvalue) {

  var value = new Array('', '');

  temp = tranvalue.split(".");

  for (var i = 0; i < temp.length; i++) {

    value = temp;

  }

  return value;

}

90、原生JavaScript常用的正则表达式大收集

匹配中文字符的正则表达式： [\u4e00-\u9fa5]

匹配双字节字符（包括汉字在内）：[^\x00-\xff]

匹配空行的正则表达式：\n[\s| ]*\r

匹配 HTML 标记的正则表达式：<(.*)>.*<\/\1>|<(.*) \/>

匹配首尾空格的正则表达式：(^\s*)|(\s*$)

匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g

匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

匹配网址 URL 的正则表达式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?

sql 语句：^(select|drop|delete|create|update|insert).*[        DISCUZ_CODE_39        ]nbsp;

非负整数：^\d+[        DISCUZ_CODE_39        ]nbsp;

正整数：^[0-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;

非正整数：^((-\d+)|(0+))[        DISCUZ_CODE_39        ]nbsp;

负整数：^-[0-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;

整数：^-?\d+[        DISCUZ_CODE_39        ]nbsp;

非负浮点数：^\d+(\.\d+)?[        DISCUZ_CODE_39        ]nbsp;

正浮点数：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))[        DISCUZ_CODE_39        ]nbsp;

非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?))[        DISCUZ_CODE_39        ]nbsp;

英文字符串：^[A-Za-z]+[        DISCUZ_CODE_39        ]nbsp;

英文大写串：^[A-Z]+[        DISCUZ_CODE_39        ]nbsp;

英文小写串：^[a-z]+[        DISCUZ_CODE_39        ]nbsp;

英文字符数字串：^[A-Za-z0-9]+[        DISCUZ_CODE_39        ]nbsp;

英数字加下划线串：^\w+[        DISCUZ_CODE_39        ]nbsp;

E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+[        DISCUZ_CODE_39        ]nbsp;

URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*[        DISCUZ_CODE_39        ]nbsp;

邮政编码：^[1-9]\d{5}[        DISCUZ_CODE_39        ]nbsp;

电话号码：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?[        DISCUZ_CODE_39        ]nbsp;

手机号码：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}[        DISCUZ_CODE_39        ]nbsp;

双字节字符（包括汉字在内）：^\x00-\xff

匹配首尾空格：(^\s*)|(\s*$)

匹配 HTML 标记：<(.*)>.*<\/\1>|<(.*) \/>

匹配空行：\n[\s| ]*\r

提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?

提取信息中的邮件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

提取信息中的图片链接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?

提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)

提取信息中的中国手机号码：(86)*0*13\d{9}

提取信息中的中国固定电话号码：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}

提取信息中的中国电话号码（包括移动和固定电话）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}

提取信息中的中国邮政编码：[1-9]{1}(\d+){5}

提取信息中的浮点数（即小数）：(-?\d*)\.?\d+

提取信息中的任何数字 ：(-?\d*)(\.\d+)?

IP：(\d+)\.(\d+)\.(\d+)\.(\d+)

电话区号：^0\d{2,3}$

腾讯 QQ 号：^[1-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;

帐号（字母开头，允许 5-16 字节，允许字母数字下划线）：^[a-zA-Z][a-zA-Z0-9_]{4,15}[        DISCUZ_CODE_39        ]nbsp;

中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$

91、原生JavaScript实现窗体改变事件resize的操作（兼容所以的浏览器）

(function(){

        var fn = function(){

                var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth

                        ,r = 1255

                        ,b = Element.extend(document.body)

                        ,classname = b.className;

                if(w < r){

                        //当窗体的宽度小于1255的时候执行相应的操作

                }else{

                        //当窗体的宽度大于1255的时候执行相应的操作

                }

        }

        if(window.addEventListener){

                window.addEventListener('resize', function(){ fn(); });

        }else if(window.attachEvent){

                window.attachEvent('onresize', function(){ fn(); });

        }

        fn();

})();

92、原生JavaScript用正则清除空格分左右

function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }

function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }

function trim(s){ return ltrim(rtrim(s));} 

93、原生JavaScript判断变量是否空值

/**

* 判断变量是否空值

* undefined, null, '', false, 0, [], {} 均返回true，否则返回false

*/

function empty(v){

    switch (typeof v){

        case 'undefined' : return true;

        case 'string'    : if(trim(v).length == 0) return true; break;

        case 'boolean'   : if(!v) return true; break;

        case 'number'    : if(0 === v) return true; break;

        case 'object'    :

            if(null === v) return true;

            if(undefined !== v.length && v.length==0) return true;

            for(var k in v){return false;} return true;

            break;

    }

    return false;

}

94、原生JavaScript实现base64解码

function base64_decode(data){

        var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

        var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];

        if (!data) { return data; }

        data += '';

        do {

                h1 = b64.indexOf(data.charAt(i++));

                h2 = b64.indexOf(data.charAt(i++));

                h3 = b64.indexOf(data.charAt(i++));

                h4 = b64.indexOf(data.charAt(i++));

                bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

                o1 = bits >> 16 & 0xff;

                o2 = bits >> 8 & 0xff;

                o3 = bits & 0xff;

                if (h3 == 64) {

                        tmp_arr[ac++] = String.fromCharCode(o1);

                } else if (h4 == 64) {

                        tmp_arr[ac++] = String.fromCharCode(o1, o2);

                } else {

                        tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);

                }

        } while (i < data.length);

        dec = tmp_arr.join('');

        dec = utf8_decode(dec);

        return dec;

}

95、原生JavaScript实现utf8解码

function utf8_decode(str_data){

        var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';

        while (i < str_data.length) {

                c1 = str_data.charCodeAt(i);

                if (c1 < 128) {

                        tmp_arr[ac++] = String.fromCharCode(c1);

                        i++;

                } else if (c1 > 191 && c1 < 224) {      

                        c2 = str_data.charCodeAt(i + 1);

                        tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));

                        i += 2;

                } else {

                        c2 = str_data.charCodeAt(i + 1);

                        c3 = str_data.charCodeAt(i + 2);

                        tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));

                        i += 3;

                }

        }

        return tmp_arr.join('');

}

96、原生JavaScript获取窗体可见范围的宽与高

function getViewSize(){

        var de=document.documentElement;

        var db=document.body;

        var viewW=de.clientWidth==0 ?  db.clientWidth : de.clientWidth;

        var viewH=de.clientHeight==0 ?  db.clientHeight : de.clientHeight;

        return Array(viewW ,viewH);

}

96、原生JavaScript判断IE版本号（既简洁、又向后兼容！）

var _IE = (function(){

    var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');

    while (

        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',

        all[0]

    );

    return v > 4 ? v : false ;

}());

97、原生JavaScript获取浏览器版本号

function browserVersion(types) {

    var other = 1;

    for (i in types) {

        var v = types ? types : i;

        if (USERAGENT.indexOf(v) != -1) {

            var re = new RegExp(v + '(\\/|\\s|: )([\\d\\.]+)', 'ig');

            var matches = re.exec(USERAGENT);

            var ver = matches != null ? matches[2] : 0;

            other = ver !== 0 && v != 'mozilla' ? 0 : other;

        } else {

            var ver = 0;

        }

        eval('BROWSER.' + i + '= ver');

    }

    BROWSER.other = other;

}

98、原生JavaScript判断鼠标是否移出事件

function isMouseOut(e, handler) {

        if (e.type !== 'mouseout') {

                return false;

        }

        var reltg = e.relatedTarget ? e.relatedTarget : e.type === 'mouseout' ? e.toElement : e.fromElement;

        while (reltg && reltg !== handler) {

                reltg = reltg.parentNode;

        }

        return (reltg !== handler);

}

99、原生JavaScript半角转换为全角函数

function ToDBC(str){

  var result = '';

  for(var i=0; i < str.length; i++){

    code = str.charCodeAt(i);

    if(code >= 33 && code <= 126){

      result += String.fromCharCode(str.charCodeAt(i) + 65248);

    }else if (code == 32){

      result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);

    }else{

      result += str.charAt(i);

    }

  }

return result;

}

100、原生JavaScript全角转换为半角函数

function ToCDB(str){

  var result = '';

  for(var i=0; i < str.length; i++){

    code = str.charCodeAt(i);

    if(code >= 65281 && code <= 65374){

      result += String.fromCharCode(str.charCodeAt(i) - 65248);

    }else if (code == 12288){

      result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);

    }else{

      result += str.charAt(i);

    }

  }

return result;

}