function popup(url,width,height) {
	var scrT = (screen.height-height)/2;
	var scrL = (screen.width-width)/2;

	var scrollbars = (scrollbars != null) ? scrollbars : 'yes';

	myWin = window.open(url,'map','left='+scrL+',top='+scrT+',height='+height+',width='+width+',toolbar=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=no');
	myWin.focus();
}