Your error is due to there not being any element with the id 'sc5' on the page. If you change the two mentions of sc5 on the page to sc1, the error disappears but the first two tabs will then show the same content (if you fix the other problem mentioned below), add another content division for the 'Home' tab. The tabcontent is not showing because your linked stylesheet:
emx_nav_left.css
leaves no room for them. Redesign the page without using absolute positioning. Just to see the tabcontent, remove the linked stylesheet's link statement:
Code:
<link rel="stylesheet" href="emx_nav_left.css" type="text/css">
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