//div实现的marquee效果
function div_scroll(obj,speed,direction){
			init_div(obj);
			//scrollx(obj);
			var scrollProc=marquee(obj,speed,direction);
			obj.onmouseover=function() {clearInterval(scrollProc);} 
			obj.onmouseout=function() {scrollProc=marquee(obj,speed,direction);} 
		}
		function marquee(obj,speed,direction){
			switch(direction){
				case 'x':
						return setInterval("scrollx(document.getElementById('"+obj.id+"'))",speed);
				case 'y':
						return setInterval("scrolly(document.getElementById('"+obj.id+"'))",speed);
			}
		}
		function init_div(obj){
			obj.style.overflow="hidden";
			obj.innerHTML+=obj.innerHTML;
		}
		function scrollx(obj){
			obj.style.whiteSpace="nowrap";
			if(obj.scrollLeft>=obj.scrollWidth-obj.offsetWidth) 
				obj.scrollLeft=0; 
			else 
				obj.scrollLeft++; 
		}
		function scrolly(obj){
			if(obj.scrollTop>=obj.scrollHeight-obj.offsetHeight) 
				obj.scrollTop=0; 
			else 
				obj.scrollTop++;
		}