请教一个移动层的特效

Question

<SCRIPT LANGUAGE=javascript>
<!--
unmove=true;
function startmove(){
unmove=false;
window.setInterval("if(div1.style.posTop<200)div1.style.posTop++",100)
}
//-->
</SCRIPT><INPUT type="button" value="Button" id=button1 name=button onclick="if(unmove){startmove()}">
<div id="div1" style="Z-INDEX: 101; LEFT: 59px; POSITION: absolute; TOP: 100px; visibility:visible"><table width="100%" border="1">
  <tr>
            <td width="39%" height="20">&nbsp;</td>
            <td width="61%">&nbsp;</td>
  </tr>
</table>
</div>

Answer 1

原来是用posTop啊！多谢大侠！散分结帖！