function runpic (mid,id1,id2,spd)
{
	var speed=spd; //数字越大速度越慢
	var tab=document.getelementbyid(mid);
	var tab1=document.getelementbyid(id1);
	var tab2=document.getelementbyid(id2);
	tab2.innerhtml=tab1.innerhtml;
	function marquee(){
	if(tab2.offsetwidth-tab.scrollleft<=0)
	tab.scrollleft-=tab1.offsetwidth
	else{
	tab.scrollleft++;
}
}
	var mymar=setinterval(marquee,speed);
	tab.onmouseover=function() {clearinterval(mymar)};
	tab.onmouseout=function() {mymar=setinterval(marquee,speed)};
}