var speed = 5;
  	var iens6 = document.all || document.getElementById;
  
  	function movedown(id){
  		if (iens6) {
 			crossobj = document.getElementById ? document.getElementById(id) : document.all.content;
  			contentheight = crossobj.offsetHeight;
 			if (parseInt(crossobj.style.top) >= (contentheight*(-1)+50)) {
 		 	crossobj.style.top = parseInt(crossobj.style.top) - speed + 'px';
  			}
  			movedownvar = setTimeout("movedown('" + id + "')",80);
  		}
  	}
  
  	function moveup(id){
  		if (iens6) {
 			crossobj = document.getElementById ? document.getElementById(id) : document.all.content;
  			contentheight = crossobj.offsetHeight;
  			if (parseInt(crossobj.style.top ) <= 0) {
 		 	crossobj.style.top = parseInt(crossobj.style.top) + speed + 'px';
  			}
  			moveupvar = setTimeout("moveup('" + id + "')",80);
  		}
  	}