https://pro-creative.pl/wp-content/themes/procreative/js/jquery.captcha.basic.js

1/**
2 * jQuery Captcha Basic
3 *
4 * @fileoverview  Plugin object
5 * @link          https://github.com/pemre/jquery-captcha-basic/
6 * @author        Emre Piskin (http://rencs.com/)
7 * @requires      jQuery 1.12.4+
8 */
9
10(function($) {
11    "use strict";
12
13    $.fn.captcha = function(param) {
14
15        // DEFAULT VARIABLES
16        var params = $.extend({
17            idCaptchaText: 'captchaText',   // The ID for the captcha text. Default is 'captchaText'.
18            idCaptchaInput: 'captchaInput', // The ID for the captcha input. Default is 'captchaInput'.
19            class: ''                       // Class name for the submit button toggle. Default is ''.
20        }, param);
21
22        // Find and disable the submit button
23        var submit = $(this).find('input[type=submit]');
24        submit.attr('disabled', 'disabled');
25
26        // Insert captcha text and input before the submit button with the given ID's
27        $('<label id="' + params.idCaptchaText + '"></label>').insertBefore(submit);
28        $('<input id="' + params.idCaptchaInput + '" aria-label="Captcha Input" type="text" required>').insertBefore(submit);
29
30        // Select text and input elements to fill
31        var label = this.find('#' + params.idCaptchaText);
32        var input = this.find('#' + params.idCaptchaInput);
33
34        // Generate random numbers and the sum of them
35        var rndmNr1 = Math.floor(Math.random() * 10),
36            rndmNr2 = Math.floor(Math.random() * 10),
37            totalNr = rndmNr1 + rndmNr2;
38
39        // Print the numbers to screen
40        $(label).text(rndmNr1 + ' + ' + rndmNr2 + ' =');
41
42        // Check the input value, enable it if the sum is correct
43        $(input).keyup(function () {
44            if ($(this).val() == totalNr)
45                submit.removeAttr('disabled').addClass(params.class);
46            else
47                submit.attr('disabled', 'disabled').removeClass(params.class);
48        });
49
50        // Don't breake jQuery chain!
51        return this;
52    }
53})(jQuery);