function launch(page) {
	file = "" + page + ".php";
	var width = 400;
	var height = 350;
	var left = (screen.width - width) / 2;
	var top = (screen.height - height) / 2;
	window.open(file,page,"Width="+width+",height="+height+",top="+top+",left="+left+", RESIZABLE=1,TOOLBAR=0,DIRECTORIES=0,STATUS=1,MENUBAR=0,SCROLLBARS=1,COPYHISTORY=0");
}