Please Help-Object Required Error

Question

I have a page where images are displayed one at a time, with hrefs to move from one picture to the next-each of these pictures has text that I am using in a java tooltip function. When I am at the start or the end of the set of images, I get an error 'Object Expected', and 'onMouseover="popup ('Tuesday','lightyellow')" ' is highlighted in the debugger, but no other information. This only happens either at the start or the end of the set, depending on where in the set you start viewing (near the start-the first image gives the error, but not the last, or if you start near the end the last image gives the error but not the first.) The error seems to be coming out of the popup function, but I can't seem to isolate it. The relevent code is below, any input would be great.
Thanks
Mike
HTML CODE
<table height=200 width=250>
<tr>
<td bgColor=white colspan=2 border=1 align=center>
<img border=0 src=i\1Hot.jpg>
</td>
</tr>
<tr>
<td align=center>
PREVIOUS
</td>
<td align=center>
NEXT
</td>
</tr>
</table>
JAVA CODE
Xoffset=-60;
Yoffset= 20;
var nav,old,iex=(document.all),yyy=-1000;
if(navigator.appName=="Netscape")
(document.layers)?nav=true:old=true;
if(!old)
var skn=(nav)?document.dek:dek.style;
if(nav)document.captureEvents(Event.MOUSEMOVE);
document.onmousemove=get_mouse;
function popup(msg,bak)
var content="<TABLE WIDTH=130 BORDER=1 BORDERCOLOR=black CELLPADDING=4 CELLSPACING=0 "+
"BGCOLOR="+bak+"><TD ALIGN=left><FONT COLOR=black SIZE=1>"+msg+"</FONT></TD></TABLE>";
if(old)
alert(msg);
return;
else
yyy=Yoffset;
if(nav)
skn.document.write(content);
skn.document.close();
skn.visibility="visible"
if(iex)
document.all("dek").innerHTML=content;
skn.visibility="visible"
function get_mouse(e)
var x=(nav)?e.pageX:event.x+document.body.scrollLeft;
skn.left=x+Xoffset;
if(nav)var y=e.pageY;
if(iex)
y=event.y;
if(navigator.appVersion.indexOf("MSIE 4"))y+=document.body.scrollTop
skn.top=y+yyy;
}

Answer 1

This is JavaScript code. JavaScript is not Java.