// javascript document
function roll_1(){
	var speed=10;//�ٶ���ֵխ���ٶ�խ��
	var colee_left2=document.getelementbyid("colee_left2");
	var colee_left1=document.getelementbyid("colee_left1");
	var colee_left=document.getelementbyid("colee_left");
	colee_left2.innerhtml=colee_left1.innerhtml
	function marquee3(){
		if(colee_left2.offsetwidth-colee_left.scrollleft<=0)
		{//offsetwidth �ƕ���ŀɼ����
			colee_left.scrollleft-=colee_left1.offsetwidth;//scrollwidth �ƕ����ʵ�����ݵŀ���������߿��
		}else{
			colee_left.scrollleft++;
		}
	}
	var mymar3=setinterval(marquee3,speed)
	colee_left.onmouseover=function() {clearinterval(mymar3);}
	colee_left.onmouseout=function() {mymar3=setinterval(marquee3,speed);}
}