Creating dropup menu?

im creating site: http://google1.php5.cz/index.html and i need for my menu dropup menu. I want to create this: if ill point my mouse on the word "ABOUT" the menu will pop up and there will be like 3 choices: something like this http://www.w3schools.com/css/tryit.asp?filename=trycss_dropdown_button but upsidedown. The problem is (like you can see on page) i cant figure out how to have have the poping up block as long as the "ABOUT" block. Thank you for any help. Also i cant use jvscript :/