Clean Up Code

The Problem: * * * * * * * * * * My website looks fine in Firefox, but some of the pages look messed in other browsers like Safari and Internet Explorer. Bullets don't show up on one page. Javascript age calculator is incorrect in some browsers. What I Need: * * * * * * * * * * 1. I need someone to clean up the code and make the pages look like the ones in Firefox. I want it to work fine in all the common browsers and screens/monitors. >> Main Site: [login to view URL] >> Messed up page example: [login to view URL] (all the student pages are messed up - links located on the Right Side) 2. I also would like an explanation for why the pages were messed up so that I know for the future. 3. I need bullets to show up on [login to view URL] with an explanation why. >> Note: I had to set the main bullet style to none because of the plug-ins/extensions I am using. 4. I need the Age & Years Playing javascript adjusted (located on the student pages). In some browsers it calculates incorrectly. In Firefox it seems to be working fine. Extra Info * * * * * * * * * * I used the following extensions: * DMX Zone - html5 mp3 player * Project Seven - Accordion Panels