[BirdOPrey5]

Hmm... no need for a JavaScript these days, guess I learned something in the 2 years since I made that last reply...

It's going to take some custom editing to get it to work/look right but I believe what you want is the CSS property: position:fixed;

You will need to edit the header template and add this property to the main <div>. You're also going to need to do something to push the whole page down by as much as the header takes up in height because making it position:fixed will effectively remove it from the main layer and the top of the forum will start behind it. You'll need to fill it with empty space.