jsp实现的新闻发布系统

				var currentpos,timer; 
				
				function initialize() 
				{ 
				timer=setInterval("scrollwindow()",10);
				} 
				function sc(){
				clearInterval(timer);	
				}
				function scrollwindow() 
				{ 
				currentpos=document.body.scrollTop; 
				window.scroll(0,++currentpos); 
				if (currentpos != document.body.scrollTop) 
				sc();
				} 
				document.onmousedown=sc
				document.ondblclick=initialize