function scrollImg(){ 
   
//    if(document.documentElement.offsetWidth>1024)
//        return;
    var posX,posY,posX1;  
    if (window.innerHeight) {  
        posX = window.pageXOffset;  
        posY = window.pageYOffset;  
    }  
    else if (document.documentElement && document.documentElement.scrollTop) {  
        posX = document.documentElement.scrollLeft; 
        posX1= document.documentElement.offsetWidth; 
        posY = document.documentElement.scrollTop;  
    }  
    else if (document.body) {  
        posX = document.body.scrollLeft;  
        posY = document.body.scrollTop; 
        posX1=document.body.offsetWidth; 
    }  

    var ad=document.getElementById("ad");  
    ad.style.top=(posY+150)+"px";  
    ad.style.left=(posX+10)+"px";   
    
    var ad1=document.getElementById("ad1");
    ad1.style.top=(posY+150)+"px";
    ad1.style.left=(posX1-160)+"px";
    setTimeout("scrollImg()",100); 
}