Javascript Image Pop up not working in FF

Well here's the javascript:

<script type="text/javascript">
function submitenter(myfield)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
{
myfield.form.submit();
return false;
}
else
return true;
}


function XY(e)
{
x = event.clientX + document.body.scrollLeft;
y = event.clientY + document.body.scrollTop;
}

function ShowMessage(text,id)
{
top_pos = y + 20 + 'px';
left_pos = x - 80 + 'px';
document.body.insertAdjacentHTML('BeforeEnd', '<DIV STYLE="position:absolute; TOP:' + top_pos + '; LEFT:' + left_pos + ';" ID="' + id + '"><table border=0 bgcolor="#000000" cellpadding=1 cellspacing=0><tr><td>' + text + '</td></tr></table></DIV>');
}

function Kill(id)
{
id.innerHTML = "";
id.outerHTML = "";
}

</script>

and here's an exmaple link:

<A onmouseover="if (window.event) XY(event); ShowMessage('<IMG SRC=images/pics/123.jpg width=150 height=120>', 'popup1')" onmouseout=Kill(popup1) HREF="http://123.com" target="_blank"">123</A>

It works perfect in IE and Opera but not in FireFox!!!

 

I believe window.event is an IE only object. You'll need to look for a proper JavaScript event handler