How to make the function ONGUI to handle both iphone and ipad

Below is the link i found
http://forum.unity3d.com/threads/screen-resolutions-first-iphone-question.108539/

 

var originalWidth = 480.0;  // define here the original resolution

var originalHeight = 320.0; // you used to create the GUI contents

private var scale: Vector3;

 

var buttonSkin : GUISkin;

 

function OnGUI ()

{

    GUI.skin = buttonSkin;

   

    //scale buttons to the correct position depending on screen resolution

    scale.x = Screen.width/originalWidth; // calculate hor scale

    scale.y = Screen.height/originalHeight; // calculate vert scale

    scale.z = 1;

    var svMat = GUI.matrix; // save current matrix

    // substitute matrix - only scale is altered from standard

    GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, scale);  

   

    ///////////////////////Your Gui Code Here//////////////////////////////    

    if(GUI.Button (Rect (170,255,120,40), "Try Again"))//iphone

    //if(GUI.Button (Rect (225,325,120,40), "Try Again"))//web 

    {

        Application.LoadLevel ("level01");

    }

   

   

    // restore matrix before returning

    GUI.matrix = svMat; // restore matrix  

}