Javascript Onmouseover problem with Firefox by Keniki

[Keniki]

Hello Everyone, I wonder if you can help advise. I have a javascript script working fine in IE but in firefox it doesn't work. I downloaded firebug and it shows me the error on page . The problem is with onmouseover.The firebug error is:
"x has no properties"

Any help gratefully recieved...

Here's the code

Code: Select all

<img src='/images/multithumbs.jpg' onmouseover="var x=document.getElementById('prodImage'); x.src=document.prodImages[0].src; document.pop_href = document.prodImages[0].pop;"