self.onError=null;         
currentX   =   currentY   =   0;         
whichIt   =   null;         
lastScrollX   =   0;   //最后离左边距离的负值
lastScrollY   =0;     //最后离顶部的高度的负值  
//----------------------start   fun秒执行一次       
function   heartBeat(id1,id2)   {         
diffY   =   document.body.scrollTop;
diffX   =   document.body.scrollLeft;   

if(diffY   !=   lastScrollY)   {         
percent   =   .1   *   (diffY   -   lastScrollY);         
if(percent   >   0)   percent   =   Math.ceil(percent);         
else   percent   =   Math.floor(percent);         
id1.style.pixelTop   +=   percent;
id2.style.pixelTop   +=   percent;       
lastScrollY   =   lastScrollY   +   percent;         
}         

if(diffX   !=   lastScrollX)   {         
percent   =   .1   *   (diffX   -   lastScrollX);         
if(percent   >   0)   percent   =   Math.ceil(percent);         
else   percent   =   Math.floor(percent);         
id1.style.pixelTop   +=   percent;
id2.style.pixelTop   +=   percent;             
lastScrollX   =   lastScrollX   +   percent;         
}         
}         
//-----------------------end   fun
scr=screen.width
left_1=(scr>800)?1:145
right_1=(scr>800)?1:145
function leftorright(left_ad,right_ad){
	//左侧图片
	document.write("<DIV   id=f1   style='left:   "+left_1+"px;   top:   50px;   POSITION:   absolute;'>"+left_ad+"<img src='close.gif' onClick='javascript:window.hide()' width='100' height='14' border='0' vspace='3' alt='关闭'></div>")
	//右侧图片
	document.write("<DIV   id=f2   style='right:   "+right_1+"px;   top:   50px;   POSITION:   absolute;'>"+right_ad+"<img src='close.gif' onClick='javascript:window.hide2()' width='100' height='14' border='0' vspace='3' alt='关闭'></div>")
	action   =   window.setInterval("heartBeat(f1,f2)",50);
}
function hide()  
{    
f1.style.visibility="hidden";
}
function hide2()  
{    
f2.style.visibility="hidden";
}