selecting a category

I'm trying to randomly click on the main category and then randomly select a subcategory but I'm unable to accomplish this task.
I have tried using a random index to click on the main category and then selecting a subcategory a checkbox exists but the problem that I'm having is that there are two columns of main categories that start with index 0. here's a link to the list of categories ( you might get session expired, just click on ok and then no to keep the window open...can you guys guide me to the right steps or give me an idea how I can select any categories & subcategories at random or selecting a category in alphabetical order every iteration.
Your help is greatly appreciated.

Thanks in advance.
ps. the application is written in .net

[ 01-04-2005, 11:56 AM: Message edited by: garifo ]