maquee代码在html4.0下有效，xhtml1.0就显示不正常

<div id="demo" style="overflow:hidden;height:180;width:210" align="center">
<div id="demo1" align="center">
<table width="210" border="0" align="center" cellpadding="0" cellspacing="0">
                <tr>
                  <td height="5"></td>
                </tr>
                <tr>
                  <td height="35"><img src="images/sub1.gif" width="210" height="35" /></td>
                </tr>
                <tr>
                  <td height="5"></td>
                </tr>
                <tr>
                  <td height="35"><img src="images/sub2.gif" width="210" height="35" /></td>
                </tr>
                <tr>
                  <td height="5"></td>
                </tr>
                <tr>
                  <td height="35"><img src="images/sub3.gif" width="210" height="35" /></td>
                </tr>
                <tr>
                  <td height="5"></td>
                </tr>
                <tr>
                  <td height="35"><img src="images/sub4.gif" width="210" height="35" /></td>
                </tr>
                <tr>
                  <td height="5"></td>
                </tr>
                <tr>
                  <td height="35"><img src="images/sub5.gif" width="210" height="35" /></td>
                </tr>
              </table>
</div>
<div id="demo2" align="center"></div>
</div>
<script>
var speed=30
demo2.innerHTML=demo1.innerHTML
function Marquee()
{
if(demo2.offsetTop-demo.scrollTop<=0)
demo.scrollTop-=demo1.offsetHeight
else
{
demo.scrollTop++
}
}var MyMar
function beginmarquee()
{
  MyMar=setInterval(Marquee,speed)
}function endmarquee()
{
 clearInterval(MyMar)
}//var MyMar=setInterval(Marquee,speed)
//demo.onmouseover=function() {clearInterval(MyMar)}
//demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">　下显示正常，Firefox下也可以。但只要头部用的是<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">就无效了，只有这句demo2.innerHTML=demo1.innerHTML被执行，表格撑成两倍大

解决方案 »

  1.   

    2种都测试了。。都没有效果。。你是怎么触发下面marquee方法的
      

  2.   

    XHTML文档必须具有良好完整的排版(well-formed)，有一些规则，参考一下下面这篇博文吧，先把页面规范了再说吧。
    http://blog.csdn.net/luo_yifan/article/details/7268299
      

  3.   


    放到一个250宽，150高的表格里就有反应了.你放在一个任意高的里面当然不会反应。我试了<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">　就可以<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">　　都不行对maquee支持怎么那么差
      

  4.   

    script部分改成下面这样就可以了<script>
                var speed=30;
                demo2.innerHTML=demo1.innerHTML
                function Marquee() {
                    if(demo2.offsetTop-demo.scrollTop<=0)
                        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>
      

  5.   

    script部分改成下面这样,然后第一行<div id="demo" style="overflow:hidden;height:180;width:210" align="center">改为:<div id="demo" style="overflow:hidden;height:180px;width:210px" align="center"><script>
      var speed=30;
      demo2.innerHTML=demo1.innerHTML
      function Marquee() {
      if(demo2.offsetTop-demo.scrollTop<=0)
      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>
      

  6.   

    http://www.chhblog.com/Web/DemoView.aspx?DemoID=19参考
      

  7.   

    那就是你的代码写的不规范导致的
    1、第一行<div id="demo" style="overflow:hidden;height:180;width:210" align="center">改为:<div id="demo" style="overflow:hidden;height:180px;width:210px" align="center">
    2、demo,demo1,demo2获取不到ID，你用documentgetElementById分别获取demo,demo1,demo2你再试下