/*
* A Popup class to open new windows, using the Prototype.js lib.
*
* Basic Usage:
*   Popup.open( url_for_popup [, options [, window_options ] ] )
*
* Example:
*   Popup.open('http://www.google.com/');
* With options:
*   Popup.open('http://www.google.com/', { focus: true }, { statusbar: 1});
*
* To close the window:
*		Popup.close('http://www.google.com');
*
* To focus the window:
*		Popup.focus('http://www.google.com');
*/

var Popup = Object.extend(Object.extend(Enumerable), {
	// open a popup
	// only mandatory is the url for the popup
	open: function(url) {
		// get the options
		var options = Object.extend({
			name: 'popup',
			focus: false
		}, arguments[1] || {});

		// get the window options
		var window_options = $H(Object.extend({
			width: 640,
			height: 480,
			toolbar: 0,
			scrollbars: 1,
			location: 0,
			statusbar: 0,
			menubar: 0,
			resizable: 1
		}, arguments[2] || {}));

		Popup[url] = window.open(url, options.name, window_options.map(function(v, i) {
			return v[0] + '=' + v[1];
		}).join(', '));

		if (options.focus) {
			this.focus(url);
		}
		return Popup[url];
	},

	// close a popup window
	// pass it the original url used to open the popup
	close: function(url) {
		if (url in this) {
			this[url].close();
			delete this[url];
		}
	},

	// focus am open popup window
	// pass it original url used to open the popup
	focus: function(url) {
		if (url in this) {
			this[url].focus();
		}
	}
});