var winH = 0;
 var win = false;
 function init()
 {
   if (navigator.appName.indexOf("Microsoft")!=-1) 
   {
     win = true;
     winH = document.body.offsetHeight-20;
   } 
 }
  
function scroll()
{
  if (win)
  {
   if (document.body.scrollTop > 105)
   { 
      inv.height= document.body.scrollTop- 104;
	   inv.width="1";
	   if(winH < 225) inv.height-= 225-winH;
   }
  }
 }