层浮动?

Question

<SCRIPT LANGUAGE="JavaScript">
<!--var diva=document.getElementById("test")
div=document.getElementById("test2")
diva.style.position='absolute'
div.style.position='absolute'
mov()
function mov()
{
diva.style.position='absolute'
diva.style.left=(3+document.body.scrollLeft).toString()+'px'
diva.style.top=(170+document.body.scrollTop).toString()+'px'div.style.position='absolute'
div.style.left=(890+document.body.scrollLeft).toString()+'px'
div.style.top=(170+document.body.scrollTop).toString()+'px'
setTimeout("mov()",10)}
-->
</SCRIPT>