var app_windows = {};

function open_application(url) {
	//var sw=screen.availWidth - 12;
	//var sh=screen.availHeight - 53;

	if (app_windows[url] == null || app_windows[url].closed) {
		w = window.open(url, "_blank","width=800,height=650,toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,screenX=0,screenY=0,left=0,top=0");
		if (w != null) {
			w.opener = this;
			w.focus();
			app_windows[url] = w;
		} else {
			alert('A popup window may have just been blocked. Please allow popups in your web browser and try again.');
		}
	} else {
		app_windows[url].focus();
	}
}