active mousehover effect by default in the megamenu

Hi,

I am customizing the corporate2 template with the megamenu style, and found out that upon calling in the browser, the megamenu always shows the first element of the menu on hover, i.e. as an active class in the javascript code I would guess. I'd like to have a megamenu with no default hover element, and I wondered if pehaps you could indicate me the proper line/file. I am not experienced in javascript, and I've been looking in the mega.js file but didn't find anything relevant to this problem.
Maybe you havec a quick fix for this, as it probably isn't such a complicated matter,

Thank you,

greg.