black Dot in top navigation Bar

Iv'e looked and looked, i might have looked over it but, theres a dot by a link in my top nav bar of my website: HVAC heating store

I can't figure out whats causing it, or how to remove it, please help.

Find this in the stylesheet and add the red part:

#tab_nav li {
/* margin: 10px 15px;/
float: left;
/ display: inline;*/
background: url("../images/bg_tabs_left.gif") no- repeat 0 0;
padding: 0 0 0 5px;
border-right: 1px solid #616161;
list-style:none;}

If you don't mind a couple of suggestions, I had to turn my computer's sound off to check the problem because of that *very *annoying 'commercial' that plays on page load. Potential customers may not be so patient. It's especially bad since it's an ad for a website I'm already on.

You have a ton of extraneous junk in the code of your site (View Code or View Source Code under the View option of your browser), probably caused by pasting content from a WYSIWYG editor. Bad idea. Much better to use the built-in editor or paste content as plain text and style it in the stylesheet.