var lastPopUpWindow = null;

function pop(sCase) {
// close the last pop-up.
	try {
		lastPopUpWindow.close();
	}catch(e){
	}
	switch(sCase) {

		case "soundboard":
			lastPopUpWindow = launchPopUpWindow('soundboard.html', 'soundboard', 625, 625);
			break;

		default:
			alert('Unimplemented pop-up.  Code: '+sCase);
			break;
	}
}