I am a little confused with a Javascript error I am getting with the front page of my website.

Now, nearly everytime I load up the page (first time) it comes up with an error (you know there is an icon in the taskbar - the little page with the yellow warning sign on it)

After I refresh the page it goes away and only sometimes comes back after a few refreshes?

I have no idea why - could somebody have a look for me..

[Please note that on the site many of the graphics are being borrowed from a few mates who have lent me them as place holders while I get the real ones done and also none of the links work @ the mo]

The address is http://www.hilariousminds.com (HilariousMinds)

Many Thanks in advance