// JavaScript Document<SCRIPT language=JavaScript>
function start_marquee(div,spd,step){
	obj_marquee = document.getElementById(div);
	marquee_high = parseInt(obj_marquee.style.height);
	marquee_step = marquee_high/step;
	obj_marquee.appendChild(obj_marquee.firstChild.cloneNode(true));
	setInterval ("step_c=1;setTimeout('marquee_show("+step+")',0)", spd*1000);
}
function marquee_show(step){
	obj_marquee.scrollTop += marquee_step;
	if(obj_marquee.scrollTop >= obj_marquee.children[1].offsetTop) {
	 obj_marquee.scrollTop = 0;
	}
	if(step_c++ < step) setTimeout("marquee_show("+step+")", 0);
	return;
}
 //用下列代码调用,div_name为层ID
 //		<SCRIPT language=JavaScript>
//start_marquee("div_name",3,10);
//                </SCRIPT>