Computerproblem..

I messed a little bit with the HTML code of this web page. My conclusions are that I messed a bit too much and that I am therefor not able to post any pictures on the page. Naturally, I could easily just change it back to the more standard versions. But I am not like that and I need to understand how the HTML code works so I can have the same layout and be able to put in pictures. I guess you could call me stubborn?