Detecting a GUI element under the mouse?

Hi people, I'm having trouble with some scripts. I'm using iGUI (It's just some information about my project), and Panels don't have a CLICK Event. They have MouseOver, MouseOut, etc. But not Click.

So, I figured why not to ask if there's an element under the mouse at the time of clicking it, and if it's a Panel, has a Tag, or something, fire an action.

The thing is, I don't know how to check for a 2D element under the mouse.

Is it posible?

Thanks!