menu building

Hi, I’m new to web developing and I’m currently working on a pop-up menu. Now I saw this really cool menu and I’d like to implement it on my site, of course with enough changes but with the same idea. Can anybody tell me how to do it? Here’s a link to this cool menu… if anyone has an idea, I’d really appreciate it ?
[url]http://www.editorial.en.tele2.lv/?page=t2i_prepaid&t2page=prepaid[/url]

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