var crossobj; 
		var contentheight;
		var moveupvar;
		var movedownvar;
		var speed=7;
		var Scrollbar;


		function movedown(){
		   if (window.moveupvar) clearTimeout(moveupvar)
		   if (parseInt(crossobj.style.top)>=(contentheight*(-1)+137))
		   crossobj.style.top=parseInt(crossobj.style.top)-speed
		   movedownvar=setTimeout("movedown()",100)
		}
		
		function moveup(){
		   if (window.movedownvar) clearTimeout(movedownvar)
		   if (parseInt(crossobj.style.top)<0)
		   crossobj.style.top=parseInt(crossobj.style.top)+speed
		   moveupvar=setTimeout("moveup()",100)
		}
		
		function stopscroll(){
		   if (window.moveupvar) clearTimeout(moveupvar)
		   if (window.movedownvar) clearTimeout(movedownvar)
		}
		
		function movetop(){
		   stopscroll()
		   crossobj.style.top=0
		}