求救~html跑马灯的问题
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>Untitled Document</title><script type="text/javascript" defer=true> var speed=20 //调整滚动速度var m0=document.getElementById("m0");m0.innerHTML=mtext.innerHTML;function Marquee(){ if(m0.offsetTop-maq.scrollTop<=0){ maq.scrollTop-=mtext.offsetHeight; } else{ maq.scrollTop++ } } var MyMar=setInterval(Marquee,speed) maq.onmouseover=function() {clearInterval(MyMar)} maq.onmouseout=function() {MyMar=setInterval(Marquee,speed)} </script></head><body><div id=maq style=overflow:hidden;height:150px;width:250px;> <div id=mtext> <p>海贼王532：是.....</p> <p>火影忍者153：是.....</p> <p>火影忍者153：是.....</p> <p>火影忍者153：是.....</p> <p>火影忍者153：是.....</p> </div> <div id="m0"></div></div></body></html>