How to check if a div is visible state or not?

Question

I have tabs like this.

     //content

Trying to check it like

Answer 1

Add your li to a class, and do $(".myclass").hide(); at the start to hide it instead of the visibility style attribute.

As far as I know, jquery uses the display style attribute to show/hide elements instead of visibility (may be wrong on that one, in either case the above is worth trying)