How do i automatically select a Text.Field?

When i create a Text.Field in the OnGUI i want to select it automatically, at present the player has to press tab to do so…
is there something i can state in script after this?

function OnGUI () {

if(debug){

textInput = GUI.TextField (Rect (10, 10, 200, 20), textInput, 25);

}

}

http://unity3d.com/support/documentation/ScriptReference/GUI.FocusControl.html