Hi, add an auto click event + example

Hi, add an auto click event + example

hi, a few days ago i wrote here but nobody really got what i wanted, so i decided to come with an example.

here is the code that i have:
http://www.wpfeed.com/carousel/carousel.html

as you can see i have three tabs and three divs with content. a click on each tab, changes the content on the Main div.
now my question:
what code do i need to add in order to create an effect of "auto play" so every X second the next tab is clicked automatically?

please help, i need this and my jquery knowledge is quit minimal.

thanks.[/url]