1. getByClass(oParent, sClass)

•  1 function getByClass(oParent, sClass)
   2 {
   3 var aEle=oParent.getElementsByTagName(‘*‘);
   4 var aResult=[];
   5 var i=0;
   6 
   7 for(i=0;i<aEle.length;i++)
   8 {
   9 if(aEle[i].className==sClass)
  10 {
  11 aResult.push(aEle[i]);
  12 }
  13 }
  14 
  15 return aResult;
  16 }

   

2. 获取样式　　

   1. function getStyle(obj,attr)
      {
      if(obj.currentStyle)
      {
      return obj.currentStyle[attr];
      }
      else
      {
      return getComputedStyle(obj,false)[attr];
      }

       

3. 完美运动框架

   • function getStyle(obj,attr)
     {
     if(obj.currentStyle)
     {
     return obj.currentStyle[attr];
     }
     else
     {
     return getComputedStyle(obj,false)[attr];
     }
     }
     function move(obj,json,fn)
     {
     clearInterval(obj.timer);
     
     obj.timer=setInterval(function(){
     var bStop=true;
     for(attr in json)
     {
     //设定初始值
     var iCur=0;
     if(attr==‘opacity‘)
     {
     iCur=parseInt(parseFloat(getStyle(obj,attr))*100);
     }
     else
     {
     iCur=parseInt(getStyle(obj,attr));
     }
     //设定速度
     var iSpeed=(json[attr]-iCur)/8;
     iSpeed=iSpeed>0?Math.ceil(iSpeed):Math.floor(iSpeed);
     if(iCur!==json[attr])
     {
     bStop=false;
     
     }
     
     if(attr==‘opacity‘)
     {
     obj.style.filter="alpha(opacity:"+(iCur+iSpeed)+‘)‘;
     obj.style.opacity=(iCur+iSpeed)/100;
     }
     else
     {
     obj.style[attr]=iCur+iSpeed+‘px‘;
     }
     }
     
     
     if(bStop)
     {
     clearInterval(obj.timer);
     
     if(fn)
     {
     fn();
     }
     }
     
     },30)
     }

4. Js获取页面地址参数 

   代码如下:
   
   

   function getUrlPara(paraName) 
   { 
   var sUrl = location.href; 
   var sReg = "(?://?|&){1}" + paraName + "=([^&]*)" 
   var re = new RegExp(sReg, "gi"); 
   re.exec(sUrl); 
   return RegExp.$1; 
   }

5. 地址跳转

   代码如下:
   
   

   var pn = $("#gotopagenum").val();//#gotopagenum是文本框的id属性 
   location.href = "http://www.mamicode.com/NewList.aspx?pagenum="+pn;//location.href实现客户端页面的跳转

    

6. 千分位

    代码如下:
   
   

   function Convert(money) 
   { 
   var s = money; //获取小数型数据 
   s += ""; 
   if (s.indexOf(".") == -1) s += ".00"; //如果没有小数点，在后面补个小数点和00 
   if (/\.\d$/.test(s)) s += "0"; //正则判断 
   while (/\d{4}(\.|,)/.test(s)) //符合条件则进行替换 
   s = s.replace(/(\d)(\d{3}(\.|,))/, "$1,$2"); //每隔3位添加一个 
   return s; 
   }

    

7. 判断是否数字

    代码如下:

   function IsNumeric(txt) { 
   if (txt == "") { 
   return false; 
   } 
   
   if (txt.indexOf(",") > 0) { 
   txt = txt.replace(",", ""); 
   } 
   
   if (isNaN(txt)) { 
   return false; 
   } 
   else { 
   return true; 
   } 
   }

    

8. 将数字进行两位小数的格式化

    代码如下:
   
   

   function changeTwoDecimal_f(x) { 
   var f_x = parseFloat(x); 
   if (isNaN(f_x)) { 
   alert(‘function:changeTwoDecimal->parameter error‘); 
   return false; 
   } 
   f_x = Math.round(f_x * 100) / 100; 
   var s_x = f_x.toString(); 
   var pos_decimal = s_x.indexOf(‘.‘); 
   if (pos_decimal < 0) { 
   pos_decimal = s_x.length; 
   s_x += ‘.‘; 
   } 
   while (s_x.length <= pos_decimal + 2) { 
   s_x += ‘0‘; 
   } 
   return s_x; 
   }

    

9. Js 进行数字运算的函数 parseFloat parseInt
   
   js 当前日期 yyyy-mm-dd 预置查询条件

    代码如下:
   
   

   var now = new Date(); 
   var year = now.getYear(); 
   
   if (now.getYear() < 1900) { 
   year = now.getYear() + 1900; 
   } 
   
   var month = now.getMonth() + 1; 
   var day = now.getDate(); 
   
   if (month < 10) month = "0" + month; 
   if (day < 10) day = "0" + day; 
   
   $("#txtDate1").val(year.toString() + "-" + month.toString() + "-01"); 
   $("#txtDate2").val(year.toString() + "-" + month.toString() + "-" + day.toString());

   Js 获取时间戳，在某些情景下代替Guid

    代码如下:
   
   

   function NowTimeCode() 
   { 
   var Result=""; 
   
   var now = new Date(); 
   
   var year = now.getYear(); 
   
   if (now.getYear() < 1900) { 
   year = now.getYear() + 1900; 
   } 
   
   var month = now.getMonth() + 1; 
   var day = now.getDate(); 
   var hour = now.getHours(); 
   var minutes = now.getMinutes(); 
   var second = now.getSeconds(); 
   var millisecond = now.getMilliseconds(); 
   
   if (month < 10) month = "0" + month; 
   if (day < 10) day = "0"+ day; 
   if (hour < 10) hour = "0"+ hour; 
   if (minutes < 10) minutes = "0"+ minutes; 
   if (second < 10) second = "0"+ second; 
   
   if (millisecond < 10) 
   millisecond = "00"+ millisecond; 
   else 
   { 
   if (millisecond < 100) 
   { 
   millisecond = "0"+ millisecond; 
   } 
   } 
   
   Result = year.toString() + month.toString() + day.toString() + hour.toString() + minutes.toString() + second.toString() + millisecond.toString(); 
   
   return Result; 
   
   } 

    

    

我的js函数库（持续更新）