What could be causing this problem at the client side ?
I have tested my page at the server side thousand of times and I have never had, that buggy message. I dont have idea to what line of code refers that "line 48" expected ")"
JavaScript errors are the biggest pain in the a**. The best way I find to try and debug js is to use netscape 7 as it has a very handy javascript console as they call it that is way better at figureing our js erros compared to IE. It under tools and nternet options or something of the like.
Your error probably refers to line 48 or there abouts give or take 5 lines. If you have php code generating the javascript you will have to do a view source and count down 48 lines to find the write spot.
If you don't mind posting your code we can all have a better look at it.