js常用技巧

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正则表达式 JavaScript IE 全文检索 Web

高级应用(一)

//各种尺寸

s+="\r\n网页可见区域宽："+document.body.clientWidth;
s+="\r\n网页可见区域高："+document.body.clientHeight;
s+="\r\n网页可见区域高："+document.body.offsetWeight+"(包括边线的宽)";
s+="\r\n网页可见区域高："+document.body.offsetHeight+"(包括边线的宽)";
s+="\r\n网页正文全文宽："+document.body.scrollWidth;
s+="\r\n网页正文全文高："+document.body.scrollHeight;
s+="\r\n网页被卷去的高："+document.body.scrollTop;
s+="\r\n网页被卷去的左："+document.body.scrollLeft;
s+="\r\n网页正文部分上："+window.screenTop;
s+="\r\n网页正文部分左："+window.screenLeft;
s+="\r\n屏幕分辨率的高："+window.screen.height;
s+="\r\n屏幕分辨率的宽："+window.screen.width;
s+="\r\n屏幕可用工作区高度："+window.screen.availHeight;
s+="\r\n屏幕可用工作区宽度："+window.screen.availWidth;

//过滤数字

<input type=text onkeypress="return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false">

//特殊用途

<input type=button value=导入收藏夹 onclick="window.external.ImportExportFavorites(true,'http://localhost');">
<input type=button value=导出收藏夹 onclick="window.external.ImportExportFavorites(false,'http://localhost');">
<input type=button value=整理收藏夹 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)">
<input type=button value=语言设置 onclick="window.external.ShowBrowserUI('LanguageDialog', null)">
<input type=button value=加入收藏夹 onclick="window.external.AddFavorite('http://www.google.com/', 'google')">
<input type=button value=加入到频道 onclick="window.external.addChannel('http://www.google.com/')">
<input type=button value=加入到频道 onclick="window.external.showBrowserUI('PrivacySettings',null)">

//不缓存

<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="0">

//正则匹配

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*$)（像vbscript那样的trim函数）
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- ./?%&=]*)?
以下是例子：
利用正则表达式限制网页表单里的文本框输入内容：
用正则表达式限制只能输入中文：onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
1.用正则表达式限制只能输入全角字符： onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
2.用正则表达式限制只能输入数字：onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
3.用正则表达式限制只能输入数字和英文：onkeyup="value=value.replace(/[\W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"

//消除图像工具栏

<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false">
or
<head>
<meta http-equiv="imagetoolbar" content="no">
</head>

//无提示关闭

function Close()
{
var ua=navigator.userAgent
var ie=navigator.appName=="Microsoft Internet Explorer"?true:false
if(ie)
{
var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE "))))
if(IEversion< 5.5)
{
var str= '<object id=noTipClose classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">'
str += '<param name="Command" value="Close"></object>';
document.body.insertAdjacentHTML("beforeEnd", str);
document.all.noTipClose.Click();
}
else
{
window.opener =null;
window.close();
}
}
else
{
window.close()
}
}

//取得控件得绝对位置(1)

<script language="javascript">
function getoffset(e)
{
var t=e.offsetTop;
var l=e.offsetLeft;
while(e=e.offsetParent)
{
t+=e.offsetTop;
l+=e.offsetLeft;
}
var rec = new Array(1);
rec[0]= t;
rec[1] = l;
return rec
}
</script>

//获得控件的绝对位置(2)

oRect = obj.getBoundingClientRect();
oRect.left
oRect.

//最小化,最大化,关闭

<object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Minimize"></object>
<object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11">
<PARAM NAME="Command" value="Close"></OBJECT>
<input type=button value=最小化 onclick=min.Click()>
<input type=button value=最大化 onclick=max.Click()>
<input type=button value=关闭 onclick=close.Click()>

//光标停在文字最后

<script language="javascript">
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',e.value.length);
r.collapse(true);
r.select();
}
</script>
<input type=text name=text1 value="123" onfocus="cc()">

//页面进入和退出的特效

进入页面<meta http-equiv="Page-Enter" content="revealTrans(duration=x, transition=y)">
推出页面<meta http-equiv="Page-Exit" content="revealTrans(duration=x, transition=y)">
这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使
用哪种特效，取值为1-23:
0 矩形缩小
1 矩形扩大
2 圆形缩小
3 圆形扩大
4 下到上刷新
5 上到下刷新
6 左到右刷新
7 右到左刷新
8 竖百叶窗
9 横百叶窗
10 错位横百叶窗
11 错位竖百叶窗
12 点扩散
13 左右到中间刷新
14 中间到左右刷新
15 中间到上下
16 上下到中间
17 右下到左上
18 右上到左下
19 左上到右下
20 左下到右上
21 横条
22 竖条
23

//网页是否被检索 <meta name="ROBOTS" content="属性值">
其中属性值有以下一些:
属性值为"all": 文件将被检索，且页上链接可被查询；
属性值为"none": 文件不被检索，而且不查询页上的链接；
属性值为"index": 文件将被检索；
属性值为"follow": 查询页上的链接；
属性值为"noindex": 文件不检索，但可被查询链接；
属性值为"nofollow":

//打印分页 <pstyle="page-break-after:always">page1</p>
<pstyle="page-break-after:always">page2</p>

//设置打印

<object id="factory" style="display:none" viewastext
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360"
></object>
<input type=button value=页面设置 onclick="factory.printing.PageSetup()">
<input type=button value=打印预览 onclick="factory.printing.Preview()">

<script language=javascript>
function window.onload()
{
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.printing.SetPageRange(false, 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"
// -- basic features
factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页"
factory.printing.footer = "（自定义页脚）"
factory.printing.portrait = false
factory.printing.leftMargin = 0.75
factory.printing.topMargin = 1.5
factory.printing.rightMargin = 0.75
factory.printing.bottomMargin = 1.5
}
function Print(frame) {
factory.printing.Print(true, frame) // print with prompt
}
</script>
<input type=button value="打印本页" onclick="factory.printing.Print(false)">
<input type=button value="页面设置" onclick="factory.printing.PageSetup()">
<input type=button value="打印预览" onclick="factory.printing.Preview()"><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static"target=_blank>具体使用手册，更多信息，点这里</a>

//自带的打印预览
WebBrowser.ExecWB(1,1) 打开
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口
Web.ExecWB(4,1) 保存网页
Web.ExecWB(6,1) 打印
Web.ExecWB(7,1) 打印预览
Web.ExecWB(8,1) 打印页面设置
Web.ExecWB(10,1) 查看页面属性
Web.ExecWB(15,1) 好像是撤销，有待确认
Web.ExecWB(17,1) 全选
Web.ExecWB(22,1) 刷新
Web.ExecWB(45,1) 关闭窗体无提示
<style media=print>
.Noprint{display:none;}
.PageNext{page-break-after: always;}
</style>
<objectid="WebBrowser"width=0height=0classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2">
</object>

<center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>

//去掉打印时的页眉页脚

<scriptlanguage="JavaScript">
var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root="HKEY_CURRENT_USER";
HKEY_Path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";
//设置网页打印的页眉页脚为空
function PageSetup_Null()
{
try
{
var Wsh=new ActiveXObject("WScript.Shell");
HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"");
}
catch(e){}
}
//设置网页打印的页眉页脚为默认值
functionPageSetup_Default()
{
try
{
var Wsh=new ActiveXObject("WScript.Shell");
HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&w&b页码,&p/&P");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&u&b&d");
}
catch(e){}
}
</script>
<input type="button" value="清空页码" onclick=PageSetup_Null()>
<input type="button" value="恢复页码" onclick=PageSetup_Default()>

//浏览器验证

function checkBrowser()
{
this.ver=navigator.appVersion
this.dom=document.getElementById?1:0
this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
this.ie4=(document.all && !this.dom)?1:0;
this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
this.ns4=(document.layers && !this.dom)?1:0;
this.mac=(this.ver.indexOf('Mac') > -1) ?1:0;
this.ope=(navigator.userAgent.indexOf('Opera')>-1);
this.ie=(this.ie6 || this.ie5 || this.ie4)
this.ns=(this.ns4 || this.ns5)
this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope)
this.nbw=(!this.bw)
return this;
}

//计算内容宽和高

<SCRIPTlanguage="javascript">
functiontest(obj)
{
varrange=obj.createTextRange();
alert("内容区宽度:"+range.boundingWidth
+"px\r\n内容区高度:"+range.boundingHeight+"px");
}
</SCRIPT>
<BODY>
<Textarea id="txt" height="150">sdf</textarea><INPUTtype="button"value="计算内容宽度"onClick="test(txt)">
</BODY>

//无模式的提示框 function modelessAlert(Msg)
{
window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}

//屏蔽按键
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript>
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title>
</head>
<body>
<script language="Javascript"><!--
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键
//Author: meizz(梅花雨) 2002-6-18
function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键
function window.onhelp(){return false} //屏蔽F1帮助
function document.onkeydown()
{
if ((window.event.altKey)&&
((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ←
(window.event.keyCode==39))) //屏蔽 Alt+ 方向键 →
{
alert("不准你使用ALT+方向键前进或后退网页！");
event.returnValue=false;
}
/* 注：这还不是真正地屏蔽 Alt+ 方向键，
因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放，
用鼠标点掉警告框，这种屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/
if ((event.keyCode==8)|| //屏蔽退格删除键
(event.keyCode==116)|| //屏蔽 F5 刷新键
(event.ctrlKey && event.keyCode==82)){ //Ctrl + R
event.keyCode=0;
event.returnValue=false;
}
if (event.keyCode==122){event.keyCode=0;event.returnValue=false;}//屏蔽F11
if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //屏蔽 Ctrl+n
if (event.shiftKey && event.keyCode==121)event.returnValue=false;//屏蔽 shift+F10
if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页
if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4
{
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;
}
}
</script>
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键
</body>
</html>

//屏蔽打印
<style>
@media print{
* {display:none}
}
</style>

//移动的图层，拖动

1.<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span>
<script language=javascript>
var Obj;
function MouseDown(obj)
{
Obj=obj;
Obj.setCapture();
Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop;
}
function MouseMove()
{
if(Obj!=null)
{
Obj.style.left = event.x-Obj.l;
Obj.style.top = event.y-Obj.t;
}
}
function MouseUp()
{
if(Obj!=null)
{
Obj.releaseCapture();
Obj=null;
}
}
</script>
2.
<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();">
<a href="#" onclick="return false"><h1>wlecome</h1></a>
</div>
<script language="JavaScript" type="text/javascript">
var orgMouseX;
var orgMouseY;
var orgObjX;
var orgObjY;
function doDrag()
{
var myObject=document.all.myDiv;

var x=event.clientX;
var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY);

}
function doMouseDown()
{
orgMouseX=event.clientX;
orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top);
}

</script>

//文档状态改变

<iframe src="a.html" id="f" name="f" scrolling="no" frameborder=0 marginwidth=0 marginheight=0></iframe>
<script>
var doc=window.frames["f"].document;
function s(){
if (doc.readyState=="complete"){
document.all.f.style.height=doc.body.scrollHeight
document.all.f.style.width=doc.body.scrollWidth
}
}
doc.onreadystatechange=s
</script>

//刷新后不变的文本框 <HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.sHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=sHistory type=text id=oPersistInput>
</BODY>
</HTML>

//访问剪贴板

event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL")
(2)普通访问
window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");

//操作COOKIE

function SetCookie(sName, sValue)
{
document.cookie = sName + "=" + escape(sValue) + "; ";
}
function GetCookie(sName)
{
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{

var aCrumb = aCookie.split("=");
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}

}
function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}

//setTimeout增加参数

<script>
var _st = window.setTimeout;
window.setTimeout = function(fRef, mDelay) {
if(typeof fRef == 'function'){
var argu = Array.prototype.slice.call(arguments,2);
var f = (function(){ fRef.apply(null, argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
window.setTimeout(test,1000,'fason');
</script>

//自定义的apply,call

Function.prototype.apply = function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this;
var argus = new Array();
for (var i=0;i<argu.length;i++)
argus = "argu[" + i + "]";
var r;
eval("r = " + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");")));
return r;
};
Function.prototype.call = function (obj) {
var argu = new Array();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments;
return this.apply(obj, argu);
};

//下载文件

function DownURL(strRemoteURL,strLocalURL)
{
try
{
var xmlHTTP=new ActiveXObject("Microsoft.XMLHTTP");
xmlHTTP.open("Get",strRemoteURL,false);
xmlHTTP.send();
var adodbStream=new ActiveXObject("ADODB.Stream");
adodbStream.Type=1;//1=adTypeBinary
adodbStream.Open();
adodbStream.write(xmlHTTP.responseBody);
adodbStream.SaveToFile(strLocalURL,2);
adodbStream.Close();
adodbStream=null;
xmlHTTP=null;

}
catch(e)
{
window.confirm("下载URL出错!");
}
//window.confirm("下载完成.");
}

//检验连接是否有效

function getXML(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);
}
}
}

//POST代替FORM

<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
strReturn = ""
For i = 1 To Len(vstrIn)
ThisChr = Mid(vStrIn,i,1)
If Abs(Asc(ThisChr)) < &HFF Then
strReturn = strReturn & ThisChr
Else
innerCode = Asc(ThisChr)
If innerCode < 0 Then
innerCode = innerCode + &H10000
End If
Hight8 = (innerCodeAnd &HFF00)\ &HFF
Low8 = innerCode And &HFF
strReturn = strReturn & "%" & Hex(Hight8) &"%" & Hex(Low8)
End If
Next
URLEncoding = strReturn
End Function
Function bytes2BSTR(vIn)
strReturn = ""
For i = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,i,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode)
Else
NextCharCode = AscB(MidB(vIn,i+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
i = i + 1
End If
Next
bytes2BSTR = strReturn
End Function
dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
msgbox bytes2BSTR(oReq.responseBody)
</SCRIPT>

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