IE 7 and Website Rendering Problems

I am not sure what is wrong with the following page and all the article pages on this website. The page is not even displayed completely.

http://highoncoding.com/Articles/717_Populating_TreeView_with_Different_Sources.aspx

On FireFox, Chro开发者_运维技巧me and IE 8 it works fine.

IE 7 has problems! Now what should I do??

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If a page renders successfully, it is either because your page has no errors or because the browser was able to cope with them.

If a page doesn't render successfully, it is either because your page has errors, because the browser has bugs, or a combination of the two.

The first thing to do is eliminate all the bugs you can find.

The markup has 107 errors (at the time of writing).

Once those are eliminated you can move onto checking the CSS.