At the computer at school when you go to a website that uses php-nuke or wiki. All you see is a white screen. The techinions will try to fix the problem if i can tell them what is causing it.

could be the browsers just dont work very well (ie some schools use this "RiscOS" on acorn pc's, or some bit of code is being banned in the filter

See if you can use a different browser (firefox or opera) and reproduce the same results, that why you will know if its a line/filter issue or a browser issue.

The school only let's us use IE. With all the computer abuse coming on. They won't have time to install firefox on all computers. A couple of years ago. people put P2P and all kinds of other software on the computers. Now the computers have filters and all kinds of retrictions.

You could try use an online anonymizer, some of the ones I've tried strip out certain parts of the website/block cookies/remove meta keywords which would be ideal to view sites that your schools network might have blocked.

School admins often have little control over what is filtered and what is not. Most schools use an ISP provided by the education board which has is filtered like a "great firewall" which is most likely blocking html tags for the sites you want to visit.

I dont know why it is turning white for you.

Turning white -- this sounds like a problem with the site's PHP configuration, not the browser.

Turning white -- this sounds like a problem with the site's PHP configuration, not the browser.
Not necessarily... Norton Internet Security, for example, used to return blank pages (you'd see a white screen) for pages it had problems parsing. I can imagine other badly written firewall/proxy software doing the same.

Yeah, forgot about stuff like Norton Security. Either way, a proxy wouldn't help if the annoying program is sitting on the client pc.