This may have been going on for a while, and I just now noticed it. But in my shopping cart, when I press the "Help" button, it pops up 2 identical help windows. They are both correct in every way. Its just that there's 2 of them, which looks unprofessional.

I then checked this issue with various browsers. The results:

Firefox: Pops 2 windows - this is my usual browser
Internet Explorer: Silently does nothing
Opera: Works perfectly
Chrome: Works perfectly

I also checked the "Estimate Shipping" java script on all 4 browsers and they all worked correctly. That was just a reality check.

Here's the code that shows up when I do a "View Source" of the page:
Code:
<div class="forward"><a href="javascript:session_win();"><input type="image" 
src="includes/templates/soft_blue/buttons/english/button_help.gif" 
alt="[ Help ? ]" title=" [ Help ] " /></a></div>
The javascript part earlier on the page:
Code:
<script language="javascript" type="text/javascript"><!--
function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=550,height=550,screenX=150,screenY=100,top=100,left=150')
}
//--></script>
<script language="javascript" type="text/javascript"><!--
function session_win() {
  window.open("http://www.fuelsaver-mpg.com/store/info_shopping_cart","info_shopping_cart","height=460,width=430,toolbar=no,statusbar=no,scrollbars=yes").focus();
}
//--></script>
I'm afraid I'm completely adrift with javascript, but I didn't see anything jump out at me as to why this would occur.

Any ideas?