Changing class on specific module

Changing class on specific module

I've got a list of modules, and when I click on one of them it expands displaying the content. When you expand them, a little image on the right changes from a down arrow (v) to an up arrow (^), but it's changing on all of the modules rather than just the one.

Here is the website: http://lab.albionmedia.biz/clients/james

It's pretty obvious what my question is; how do I get it so the image only changes on the module that you expand?

Here's the code for the moduleToggle function:
  1. function moduleToggle() {
        $('.content').hide();
        $('.title').click(function() {
            $(this).next().slideToggle('normal');
            $('.module .title span').toggleClass('up');
        });
    }







Thank you for any replies!

C