popit help

[dodozhang21]

hi, i'm trying to install this script
http://www.dynamicdrive.com/dynamicindex1/popit.htm

and it's been working on other sites of mine but not this one and i just can not figure out why
http://dodosmb.com

hover over "stars" or "special"
on firefox the menu shows up on the left side of the screen

on IE, it also shows up funny.

i made the script an external link
http://dodosmb.com/js/headermenu.js

any help is appreciated.