root/vstup/js/skript.js @ 91:1a70b4045a19

Revision 84:f866267d7b3c, 1.3 KB (checked in by František Kučera <franta-hg@…>, 13 years ago)

ROT13 – šifrování #18

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1/**
2 * XML Web generátor – program na generování webových stránek
3 * Copyright © 2012 František Kučera (frantovo.cz)
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
17 */
18
19/**
20 * XML Web generátor – jmenný prostor
21 */
22var xwg = {
23        /**
24         * Zašifruje/dešifruje obsah elementu pomocí Rot13.
25         * @param id ID elementu, jehož text chceme změnit.
26         */
27        rot13: function(id) {
28                var e = document.getElementById(id);
29                e.textContent = e.textContent.rot13();
30        }
31};
32
33/**
34 * Vrací hodnotu textového řetězce zašifrovanou/dešifrovanou algoritmem Rot13
35 */
36String.prototype.rot13 = function() {
37        return this.replace(/[a-zA-Z]/g, function(z) {
38                return String.fromCharCode((z <= "Z" ? 90 : 122) >= (z = z.charCodeAt(0) + 13) ? z : z - 26);
39        });
40};
41
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