var timeaddhead = 500;
    var hideaddhead = 0;
    //从height为0开始逐步显示广告
	function addCount()
    {        
		if(timeaddhead>0)
        {
            timeaddhead--;
            hideaddhead = hideaddhead+20;
        }
        else
        {
            return;
        }
        if(hideaddhead>500)  //高度
        {
            return;
        }
		
        document.getElementById("baidu_clb_slot_iframe_200579").style.display = "";
        document.getElementById("baidu_clb_slot_iframe_200579").style.height = hideaddhead+"px";
        setTimeout("addCount()",30);
    }
    
	
    //start:首页顶部弹出广告
    window.onload = function showadsHead()
    {
        if(document.getElementById("baidu_clb_slot_iframe_200579")){
			//addCount();//省略height为0开始逐步显示广告
        	setTimeout("noneadsHead()",15000); //停留时间自己适当调整
		}
    }
    //end  
	
    
	  
    var TimeHead = 500;
    var NoteHead = 500; //高度
    function noneadsHead()
    {
        if(TimeHead>0)
        {
            TimeHead--;
            NoteHead = NoteHead-15;
        }
        else
        {
            return;
        }
        if(NoteHead<0)
        {
            document.getElementById("baidu_clb_slot_iframe_200579").style.display = "none";
            return;
        }
        
        document.getElementById("baidu_clb_slot_iframe_200579").style.height = NoteHead+"px";
        setTimeout("noneadsHead()",30);
    }