marqueeyHeight=140;      //定义高度
stopscroll=false; 
with(marqueey){
      style.width=0;
      style.height=marqueeyHeight;
      style.overflowX="visible";
      style.overflowY="hidden";
      noWrap=true;
      onmouseover=new Function("stopscroll=true");
      onmouseout=new Function("stopscroll=false");
}
document.write('<div id="templayer" style="position:absolute;z-index:1;visibility:hidden"></div>');
preTop=0; currentTop=0;
function init(){
      templayer.innerHTML="";
      while(templayer.offsetHeight<marqueeyHeight){
          templayer.innerHTML+=marqueey.innerHTML;
      }
      marqueey.innerHTML=templayer.innerHTML+templayer.innerHTML;
      setInterval("scrollUp()",40);      //滚动速度控制,越大越慢
}
document.body.onload=init;
function scrollUp(){
      if(stopscroll==true) return;
      preTop=marqueey.scrollTop;
      marqueey.scrollTop+=1;
      if(preTop==marqueey.scrollTop){
          marqueey.scrollTop=templayer.offsetHeight-marqueeyHeight;
          marqueey.scrollTop+=1;
      }
}