<!--


//左侧广告id
var LeftDiv = "Javascript.LeftDiv";
//右侧广告id
var RightDiv = "Javascript.RightDiv";

var showad = true;
var Toppx = 60;    //上端位置
var AdDivW = 10;   //宽度
var AdDivH = 360;   //高度
var PageWidth = 800; //页面多少宽度象素下正好不出现左右滚动条
var MinScreenW = 1024; //显示广告的最小屏幕宽度象素 


//屏蔽错误提示
//window.onerror = function(){return true;};
//获得对象
function $(id)
{
   var obj = window.document.getElementById(id);
   if (obj)
      { return obj;}
   else
      { return false;}
}

//隐藏对象
function hide(id)
{
  if($(id)){$(id).style.display = 'none';}

}

//显示对象
function show(id)
{
  if($(id)){$(id).style.display = 'block';}

}


function scall(){


	if(!showad){return;}
	if (window.screen.width<MinScreenW){
	   //alert("临时提示：\n\n显示器分辨率宽度小于"+MinScreenW+",不显示广告");
	   showad = false;
	   hide(LeftDiv);
	   hide(RightDiv);
	   return;
	}
	var Borderpx = ((window.screen.width-PageWidth)/2-AdDivW)/2;
	
	
	//alert(document.body.scrollTop+document.documentElement.scrollTop);
	//alert(document.documentElement.scrollLeft);
	
	
	//显示左侧广告
	if($(LeftDiv)){
		show(LeftDiv);
		$(LeftDiv).style.top=document.documentElement.scrollTop+Toppx;
		$(LeftDiv).style.left=document.documentElement.scrollLeft+Borderpx;
	}
	
	//显示右侧广告
	if($(RightDiv)){
		show(RightDiv);
		$(RightDiv).style.top=document.documentElement.scrollTop+Toppx;
		$(RightDiv).style.left=document.documentElement.scrollLeft+document.documentElement.clientWidth-$(RightDiv).offsetWidth-Borderpx;
	}
}
function hidead()
{
	showad = false;
	if($(LeftDiv)){hide(LeftDiv);}
	if($(RightDiv)){hide(RightDiv);}
}
window.onscroll=scall;
window.onresize=scall;
window.onload=scall;
//-->