//获取样式

     function getStyle(obj,name){

         if(obj.currentStyle){

             return obj.currentStyle[name];

         }

         else{

             return getComputedStyle(obj,false)[name];

         }

     }

     //获取鼠标的位置

     function getPos(ev){

         var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;

         var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;

         return{x:ev.clientX+scrollLeft,y:ev.clientY+scrollTop}  //以一个json的形式返回

     }

     //通过className选择元素

     function getByClass(oParent,sClass){

         var aResult = [];

         var aEle = oParent.getElementsByTagName('*');

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

             if(aEle[i].className == sClass){

                 aResult.push(aEle[i]);

             }

         }

         return aResult;   //返回一个数组

     }

     //完美运动框架

     function startMove(obj,json,fnEnd){

         clearInterval(obj.timer);

         obj.timer=setInterval(function(){

             var bStop=true;  //这一次运动就结束了---所有值都已经到了

             for(var attr in json){///

                 //1.取当前的值

                 var cur = 0;

                 if(attr == 'opacity'){

                     cur = Math.round((parseFloat(getStyle(obj,attr)))*100);

                 }

                 else{

                     cur = parseInt(getStyle(obj,attr));

                 }

 //2.算速度

                 var speed = (json[attr]-cur)/6;

                 speed = speed>0?Math.ceil(speed):Math.floor(speed);

 //3.检测停止

                 if(cur != json[attr]){

                     bStop = false;

                 }

                 if(attr == 'opacity'){

                     obj.style.filter = 'alpha(opacity:'+(cur+speed)+')';

                     obj.style.opacity = (cur+speed)/100;

                 }else{

                     obj.style[attr] = cur + speed + 'px';

                 }

             }///

             if(bStop){

                 clearInterval(obj.timer);

                 if(fnEnd) fnEnd;

             }

         },30);

     }

     //事件绑定函数

     function myAddEvent(obj,ev,fn){

         if(obj.attachEvent){

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

         }

         else{

             obj.addEventListener(ev,fn,false);

         }

     }

     //全兼容的 事件绑定  and  阻止默认事件

     var EventUtil = {

 //Notice: type is not include 'on', for example: click mouseover mouseout and so on

         addHandler: function(element, type, handler){

             if (element.addEventListener){

                 element.addEventListener(type, handler, false);

             } else if(element.attachEvent){

                 element.attachEvent('on'+type, handler);

             } else {

                 element['on'+type] = handler;

             }

         },

         preventDefault: function(event){

             if(event.preventDefault){

                 event.preventDefault();

             }else{

                 event.returnValue = false;

             }

         }

     };

     //ajax函数

     function ajax(url,fnSucc,fnFaild){

 //1.创建Ajax对象

         if(window.XMLHttpRequest){

             var oAjax = new XMLHttpRequest();

         }

         else{

             var oAjax = new ActiveXObject("Microsoft.XMLHttp");

         }

 //2.连接服务器

         oAjax.open('GET',url,true);

 //3.发送请求

         oAjax.send();

 //4.接受返回值

         oAjax.onreadystatechange = function(){

             if(oAjax.readyState == 4){  //读取完成

                 if(oAjax.status == 200){  //成功

                     fnSucc(oAjax.responseText);

                 }

                 else{

                     if(fnFaild){     //传进来了才会用

                         fnFaild(oAjax.status);

                     }

                 }

             }

         };

     }