Raycasting & shop system

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//****** You can donate directly to Jesse through paypal at  https://www.paypal.me/JEtzler   ******

var hit : RaycastHit;
var shopOpen : boolean = false;

function OnGUI () {

    if(shopOpen == true) {
        if (GUI.Button(Rect(10,70,50,30),"Item 1"))
            Debug.Log("You bought an item");
        }
}

function Update () {

    if(Input.GetMouseButtonDown(0) &&
       collider.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), hit,Mathf.Infinity)) {

        shopOpen = true;
    }
}