function $(){
    if(document.all){ // 判断是否IE浏览器
        var obj=document.all;
        for(var i=0;i<obj.length;i++){
            obj[i].onmouseover=function(){
                this.className="hover"
            } ;
            obj[i].onmouseout=function(){
                this.className=""
            } 
        }
    }
}
$();

//在线客服浮动
var delta = 0.15;  //移动速度，数字越大越快，注意：值要小于等于1 
var collection; 
var closeFlag = false; 
  
function ad_object() 
{  
 this.items = []; 
 this.addItem = function(ad_id, ad_w, ad_h, ad_x, ad_y, ad_content) 
 { 
  document.write('<div id="'+ad_id+'" style="z-index:10;position:absolute;width:'+ad_w+'px;height:'+ad_h+'px;left:'+(typeof(ad_x)=='string'?eval(ad_x):ad_x)+'px;top:'+(typeof(ad_y)=='string'?eval(ad_y):ad_y)+'px;"><div style="float:right;z-index:11;width:24px;height:12px;top:10px;left:'+(ad_w-30)+'px;position:absolute;font-size:12px;cursor:pointer;" onclick="javascript:closeAd('+ad_id+');">X</div><div>'+ad_content+'</div></div>'); 
  var newItem = {}; 
  newItem.object = document.getElementById(ad_id); 
  newItem.x = ad_x; 
  newItem.y = ad_y; 
  this.items[this.items.length] = newItem; 
 } 
 this.play = function() 
 { 
  collection = this.items 
  setInterval('play()',30); 
 } 
} 
function play() 
{ 
 for(var i=0;i<collection.length;i++) 
 { 
  var followObj = collection[i].object; 
  var followObj_x = (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x); 
  var followObj_y = (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y); 
   
  if(followObj.offsetLeft != (document.documentElement.scrollLeft + followObj_x)) 
  { 
   var dx = (document.documentElement.scrollLeft + followObj_x - followObj.offsetLeft) * delta; 
   dx = (dx > 0 ? 1 : -1) * Math.ceil(Math.abs(dx)); 
   followObj.style.left = followObj.offsetLeft + dx + "px"; 
  } 
  if(followObj.offsetTop != (document.documentElement.scrollTop + followObj_y)) 
  { 
   var dy = (document.documentElement.scrollTop + followObj_y - followObj.offsetTop) * delta; 
   dy = (dy > 0 ? 1 : -1) * Math.ceil(Math.abs(dy)); 
   followObj.style.top = followObj.offsetTop + dy + "px"; 
  } 
 } 
}  
   
function closeAd(obj_id) 
{ 
 eval(obj_id).style.display = "none"; 
 return; 
} 
var ads = new ad_object(); 
ads.addItem('onlinekefu',117,234,'document.documentElement.clientWidth-118',140,'<div id="floatdiv"><a href="tencent://message/?uin=594676387&Site=ATA医学网站&Menu=yes" target="_blank"><img src="/template/images/qq.gif" alt="点击立即交谈" border="0" /> QQ在线</a></div>'); //插入广告 ID，宽，高，X,Y,内容
ads.play();