<script>
                                 var speed=40  
                                 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)}

拼html代码?
有什么做用啊?

谢谢了啊