menu Visibility trigger ???

I am making a Menu in 3D. I am using Planes with Textures to construct it. I am having 3D text. This is what my code Looks like for it. var isQuit=false;

function OnMouseEnter(){ renderer.material.color=Color.blue; }

function OnMouseExit(){ renderer.material.color=Color.white; }

function OnMouseUp(){ if (isQuit==true) { Application.Quit(); } else {

 Application.LoadLevel(2);
 }

} However, I do have a Plane behind the text that I want to make invisible when the mouse is not over it. The only time i want the Plane to be visible is when the Mouse is over it.

eX:When I hover over Start the text will change color, and the Plane that is behind it will become visible.

How can i write such Code>>???