How to disable a shader in a material

Drop this script on your object, run the game and press spacebar to see the outline appear/disappear:

 private var shaderNoOutline = Shader.Find( "Toon/Basic" );
 private var shaderOutline = Shader.Find( "Toon/Basic Outline" );
  
 function Update() {
     if( Input.GetButtonDown("Jump") ) {
         if( renderer.material.shader == shaderNoOutline )
             renderer.material.shader = shaderOutline;
         else
             renderer.material.shader = shaderNoOutline;
     }
 }