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I've been trying to do the following 2 things, but have been unsuccessful. I know they're really simple, but I just can't seem to get them to work. Here's the website I started coding today.

1) I'm trying to make a 3-column gallery layout. It sounds so simple, but I have been unsuccessful so far. Not sure how to achieve this. I Google'd and came across various articles, but none of them were aligning properly. See the link provided. I want to have three 320px wide thumbnails. I tried creating lists, and floating divs. I could use a table, but aren't divs better now? Suggestions?

2) I'm trying to make it so each button in the menu has a different colour in hover and selected state. The other two are different pages, but I'm not sure how to change them and keep the same effect. I found the script here.

I am new to this so any help is appreciated :)