Application.openurl won't work on android?

I am trying to open a simple webpage (google for example) and it works fine in editor but not on my android tablet?!?!?!?

using UnityEngine;
using System.Collections;

public class GUITest : MonoBehaviour {


	// Use this for initialization
	public GUISkin guiskin;

	void Start () {
	
	}
	
	// Update is called once per frame
	void OnGUI () {
		GUI.skin = guiskin;
		if(GUI.Button (new Rect(100,100,300,100), "Test")){
			Debug.Log ("testclick");
			Application.OpenURL("www.google.com");
		}

	}
}

oops, forgot to have the app ask permission