function launchWindow(url, width, height){
	// place the popup window in the center of the screen
	var left = (screen.width - width) / 2;
	var top = (screen.height - height) / 2;

	var myWindow = window.open (url, "CenteredWindow", "status=1, resizable=1, scrollbars=1, height="+height+", width="+width+", left="+left+", top="+top);
	if (window.focus) {myWindow.focus();}
}