Rich, there is a good reason not to do that. Let's say you are reading a thread that has long posts. When you get to the end and want to go back to the forum level do you scroll alllllll the way back up and hit the navigation or do you just click the go button? I don't scroll, I just click go. It's faster by far.
If you make your menu lose the go button and only work on an on change event you lose that functionality.
Not to pick on Ian (too much <img src="https://www.ubbcentral.com/boards/images/graemlins/tongue.gif" alt="" /> ) but he has it set up that way on his boards. Take a look (his forum is in his signature) and see which way you prefer. If you prefer the "onchange" method I'm sure Ian would be willing to show you how do do it over at UBBdev.com
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