I need to make a 3D button that when clicked it does something to another object.

I've modeled a 3D button and put it in my Unity game. I need to be able to click on the button which will lower a wall. The button also needs to go up and down when it is clicked so it looks like it has been pressed. I'm new to Unity and Java script so please help! Thank you very much.

You might want to take a look at OnMouseDown and iTween. If you're completely new to Unity and Javascript you may want to read this tutorial and search for others on the web.