Click & Show only if there is an existing div class
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My old question: http://stackoverflow.com/questions/11373619/one-page-fadein-fadeout-transition-logic

The code works pretty good, but i have an issue. In my navigation system there are menu's with submenus, aka drop-down menus. So if a menu link is clicked with no content, but sub-menus, the content page is loaded blank, until i click something that actually has a content class.

Here is a simple jsFiddle example: http://jsfiddle.net/QuKhN/1/

I want it to load content, only if there is content corresponding to the menu link id. So if "Contact Us" is clicked in this example, i don't want it to try to load an un-existing div called "contactus content".

Is this possible?
I have tried few things with hasClass() function, but i failed to succeed.

Thanks for taking time to read and understand.