Can anyone tell me what's wrong with this script?

[wxdqz]

I found this script somewhere and it is'n working. Can anyone tell me what's wrong with it?
<script type="text/javascript">
<xsl:comment>
<![CDATA[
document.write('<STYLE TYPE="text/css"><!--#dek {POSITION:absolute;VISIBILITY:hidden;Z-INDEX:200;}//--></STYLE><DIV ID="dek"></DIV>');


Xoffset=-60; // modify these values to ...
Yoffset= 20; // change the popup position.

var old,skn,iex=(document.all),yyy=-1000;

var ns4=document.layers
var ns6=document.getElementById&&!document.all
var ie4=document.all

if (ns4)
skn=document.dek
else if (ns6)
skn=document.getElementById("dek").style
else if (ie4)
skn=document.all.dek.style
if(ns4)document.captureEvents(Event.MOUSEMOVE);
else{
skn.visibility="visible"
skn.display="none"
}
document.onmousemove=get_mouse;

function popup(msg,bak){
var content="<TABLE BORDER=1 BORDERCOLOR=white CELLPADDING=2 CELLSPACING=0><TD ALIGN=center BGCOLOR="+bak+"><FONT COLOR=black><b><table border=0 width=100%><tr><td><iframe id=ale style=zoom:1;width:100;height:100px;
src="+msg+"></iframe></td></tr></table></b></FONT></TD></TABLE>";
yyy=Yoffset;
if(ns4){skn.document.write(content);skn.document.close();skn.visibility="visible"}
if(ns6){document.getElementById("dek").innerHTML=content;skn.display=''}
if(ie4){document.all("dek").innerHTML=content;skn.display=''}
}

function get_mouse(e){
var x=(ns4||ns6)?e.pageX:event.x+document.body.scrollLeft;
skn.left=x+Xoffset;
var y=(ns4||ns6)?e.pageY:event.y+document.body.scrollTop;
skn.top=y+yyy;
}

function kill(){
yyy=-1000;
if(ns4){skn.visibility="hidden";}
else if (ns6||ie4)
skn.display="none"
}

//-->
]]>
</xsl:comment>
</script>



then, somewhere in xsl:
<A onmouseover="popup('interklub.jpg','black')"
onmouseout="kill()" href=http://www.webdeveloper.com/forum/archive/index.php/"">anytext</A><br/><br/>

thx in advance