[jQuery] IE Problem with (function($)

I have a problem with Internet Explorer ( all versions ) . The following is my JQuery Code , which executes perfectly in mozilla and chrome.. But it doesn't work in Internet Explorer. It says : Syntax error ( line 1 )... Can anyone help me out here.. Thanks for your time in reading this.

[jQuery] Navigation with active state

I have a navigation like this div id=mainnav ul id=nav li class=suba href=a.htmlb class=img src=img1-off.gif alt=About GTx //b/a ul lia href=a.htmlnav1 /a/li lia href=b.htmlnav2 /a/li lia href=c.htmlnav3 /a/li /ul /li li class=suba href=d.htmlb class=img src=img2-off.gif alt=About GTx //b/a ul