Use the GUITexture to go to the next scene

I am new in the Unity.

I have a simple question that I can’t solve it:
How to use the GUITexture to go to the next scene? like load next level

for example that I click the GUITexture and scene to next scene.
(the GUITexture is a little picture)

Can help me a script?

Thanks a lot.

And Sorry for my bad English.

A GUITexture can detect mouse clicks. Just add this script to the GUITexture:

function OnMouseDown(){

By the way, the example in OnMouseDown is exactly about this subject.