/**

 * XML Web generátor – program na generování webových stránek

 * Copyright © 2012 František Kučera (frantovo.cz)

 * 

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

/**

 * XML Web generátor – jmenný prostor 

 */

var xwg = { 

	/**

	 * Zašifruje/dešifruje obsah elementu pomocí Rot13.

	 * @param id ID elementu, jehož text chceme změnit.

	 */

	rot13: function(id) {

		var e = document.getElementById(id);

		e.textContent = e.textContent.rot13();

	}

};

/**

 * Vrací hodnotu textového řetězce zašifrovanou/dešifrovanou algoritmem Rot13 

 */

String.prototype.rot13 = function() {

	return this.replace(/[a-zA-Z]/g, function(z) {

		return String.fromCharCode((z <= "Z" ? 90 : 122) >= (z = z.charCodeAt(0) + 13) ? z : z - 26);

	});

};