/*----------------------------------------------------------------------------------------------------------------------------
 * Popup
 */
var Popup = {
	open: function(url, options) {
		this._options = {
			width: 580,
			height: 340,
			centred: true,
			name: 'popup',      
			params: 'menubar=no,location=no,resizable=yes,scrollbars=yes,status=no'
		}
		Object.extend(this._options, options || {});
		this._options.left = (screen.width-this._options.width) / 2;
		this._options.top = (screen.height-this._options.height) / 2;
		if (this._options.centred) {
			this._options.params += ',left='+this._options.left+',top='+this._options.top;
		}
		var p = window.open(url, this._options.name, 'width='+this._options.width+',height='+this._options.height+','+this._options.params);
		if (p) p.focus();
		return true;
  }
}