/*
lh:滚动高度，每行文字的高度
speed:文字滚动速度
delay：每次滚动间隔时间
*/
function startmarquee(lh,speed,delay) { 
var p=false; 
var t; 
var o=document.getElementById("marqueebox"); 
o.innerHTML+=o.innerHTML; 
o.style.marginTop=0; 
o.onmouseover=function(){p=true;} 
o.onmouseout=function(){p=false;} 
function start(){ 
t=setInterval(scrolling,speed); 
if(!p) o.style.marginTop=parseInt(o.style.marginTop)-1+"px"; 
} 
function scrolling(){ 
if(parseInt(o.style.marginTop)%lh!=0){ 
o.style.marginTop=parseInt(o.style.marginTop)-1+"px"; 
if(Math.abs(parseInt(o.style.marginTop))>=o.scrollHeight/2) o.style.marginTop=0; 
}else{ 
clearInterval(t); 
setTimeout(start,delay); 
} 
} 
setTimeout(start,delay); 
} 
startmarquee(22,20,3000);