Are you even trying to figure this stuff out?

function OnGUI() {
        if(showGUI) {
                GUI.skin = guiSkin;
                win1Rect = GUI.Window(1, win1Rect, fillWindow, win1);
                GUI.Box(Rect(0, Screen.height-22, 100, 22), item2);
        }
}

ohhh thank you .....i am... so far i tried my best reading all the unity manuals and i made this script but i just couldn figure out where to put the if(showGUI) ...originaly i put it next to the Destroy(enemy) but that only got rid of the actual button......welll thank you .....i gess the lesson 4 me here is watch my >>>>>>}<<<<<:)