js 工具

1、js日期格式化：

   使用方式：new Date(v).format('yyyy-MM-dd hh:mm');

Date.prototype.format = function(format) {
    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;
}

 

2、过滤HTML，自动提取摘要功能

//HTML过滤
function removeHTMLTag(str) {
    str = str.replace(/<\/?[^>]*>/g,""); //去除HTML tag
    str = str.replace(/[ | ]*\n/g,'\n'); //去除行尾空白
    str = str.replace(/&nbsp;/ig,"");//去掉&nbsp
    str = str.replace(/[\r\n]/g,"");  //去掉回车换行
    str = str.replace(/\s+/g, ""); //去掉字符串所有空格
    return str;
}

 

3、js清除File控件

    使用方法: <input id="file1" type="file" /> <input type="button" value="清空" onclick="cleanFile('file1')" /> 

    <script>  
    function cleanFile(id){  
    var _file = document.getElementById(id);  
    if(_file.files){  
    _file.value = "";  
    }else{  
    if (typeof _file != "object"){ return null; }  
    var _span = document.createElement("span");  
    _span.id = "__tt__";  
    _file.parentNode.insertBefore(_span,_file);  
    var tf = document.createElement("form");  
    tf.appendChild(_file);  
    document.getElementsByTagName("body")[0].appendChild(tf);  
    tf.reset();  
    _span.parentNode.insertBefore(_file,_span);  
    _span.parentNode.removeChild(_span);  
    _span = null;  
    tf.parentNode.removeChild(tf);  
    }  
    }  
    </script>  

 

4、js兼容ie和火狐的回车键事件

<script type="text/javascript">
    document.onkeypress=function(e)
    {
        var code; 
        if  (!e) 
        { 
            var e=window.event; 
        } 
        if(e.keyCode) 
        {   
            code=e.keyCode; 
        } 
        else if(e.which) 
        { 
            code   =   e.which; 
        }
        if(code==13)
        {

          ///这里是调用执行的方法
           /// return false;
        }
    }
</script>

 

5、获取当前时期格式如0000-00-00

function showdate(){ 
  var today=new Date(); 
  date=today.getDate(); 
  month=today.getMonth(); 
  month=month+1; 
  if(month<=9) 
     month="0"+month; 
  year=today.getYear(); 
  var nowDate=year+'-'+month+'-'+date; 
  return nowDate; 
} 

 

6、获得当地时间

function TimeDemo(){ 
   var d, s=""; 
   var c = ":"; 
   d = new Date(); 
   s += d.getHours() + c; 
   s += d.getMinutes() + c; 
   s += d.getSeconds() + c; 
   s += d.getMilliseconds(); 
   return s; 
} 

 

7、判断两个标准格式日期的大小并返回较大的日期0000-00-00

function compareTwoDate(date1,date2){ 
  date1=date1.substring(0,10); 
  date2=date2.substring(0,10); 
  if(date1<date2){ 
     return date2; 
  }else if(date1>date2){ 
     return date1; 
  } 
  return date1; 
} 

 

8、得到某个日期N天之后的日期

afterDay=function(objDate,dayNum){ 
     var arr=new Array; 
//var objDate='2010-04-13'; 
objDate=objDate.substring(0,10); 
//alert(objDate+"/obj/"); 
arr=objDate.split("-"); 
//alert(arr[0]+"==year"); 
//alert(Number(arr[1])+"==month"); 
//alert(arr[2]+"==day"); 
year=arr[0]; 
month=arr[1]; 
day=arr[2]; 
     var dat = new Date(Number(year),Number(month)-1,Number(day)); 
     var daysec=dat.getTime()+dayNum*24*3600*1000; 
var tempdate=new Date(daysec).toLocaleString().split(" ")[0];//[)左闭右开 
year=tempdate.substring(0,tempdate.indexOf("年")); 
     month=tempdate.substring(tempdate.indexOf("年")+1,tempdate.indexOf("月")); 
if(month.toString().length==1){ 
month="0"+month; 
} 
day=tempdate.substring(tempdate.indexOf("月")+1,tempdate.indexOf("日")); 
if(day.toString().length==1){ 
    day="0"+day; 
} 
return year+"-"+month+"-"+day; 
return tempdate; 
}