网页滚动字幕.rar javascript

<div id="demo" style="width:100px; height:100px; overflow:hidden;"> <div id="demo1"> My name is Li Fuli! I love my country! I love my family!<br /> 我是李福利我爱我的祖国！我爱我家 <br /> <hr> </div> <div id="demo2"> </div> </div> <script> var speed=10; var oldnum=demo.scrollHeight-demo.offsetHeight; demo2.innerHTML=demo1.innerHTML; function Marquee(){ //alert(demo2.offsetTop); //alert('s'+demo.scrollTop); if(demo2.offsetTop-demo.scrollTop<=0 || (demo2.offsetTop-demo.scrollTop==0-oldnum)) { demo.scrollTop-=demo1.offsetHeight; } else{ demo.scrollTop++; } } var MyMar=setInterval(Marquee,speed) demo.onmouseover=function() {clearInterval(MyMar)} demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)} </script>