https://esperanto-france.org/prive/javascript/jquery.placeholder-label.js?1788349516

1/**
2* Placeholder label
3* https://github.com/AbleTech/jquery.placeholder-label
4*
5* Copyright (c) 2010 Able Technology Consulting Limited
6* http://www.abletech.co.nz/
7*/
8(function($) {
9  $.placeholderLabel = {
10    placeholder_class: null,
11    add_placeholder: function(){
12      if($(this).val() == $(this).attr('placeholder')){
13        $(this).val('').removeClass($.placeholderLabel.placeholder_class);
14      }
15    },
16    remove_placeholder: function(){
17      if($(this).val() == ''){
18        $(this).val($(this).attr('placeholder')).addClass($.placeholderLabel.placeholder_class);
19      }
20    },
21    disable_placeholder_fields: function(){
22      $(this).find("input[placeholder]").each(function(){
23        if($(this).val() == $(this).attr('placeholder')){
24          $(this).val('');
25        }
26      });
27
28      return true;
29    }
30  };
31
32  $.fn.placeholderLabel = function(options) {
33    // detect modern browsers
34    var dummy = document.createElement('input');
35    if(dummy.placeholder != undefined){
36      return this;
37    }
38
39    var config = {
40      placeholder_class : 'placeholder'
41    };
42
43    if(options) $.extend(config, options);
44

45    $.placeholderLabel.placeholder_class = config.placeholder_class;
46
47    this.each(function() {
48      var input = $(this);
49
50      input.focus($.placeholderLabel.add_placeholder);
51      input.blur($.placeholderLabel.remove_placeholder);
52
53      input.triggerHandler('focus');
54      input.triggerHandler('blur');
55
56      $(this.form).submit($.placeholderLabel.disable_placeholder_fields);
57    });
58
59    return this;
60  }
61})(jQuery);