Yep, your site came up this time. The error doesn't show at all in Mozilla but it does show the error icon in IE. I had a similar problem with my site and it was in the header.htm. Mozilla had no problem with document.onmousedown=right; but IE had to have document.onmousedown="right";
I would check the code in the header.htm and footer.htm first.
FYI: Line 396 in your html is: <body onload="editInit();">
editInit(); is the object expected.