https://www.tokioka.co.jp/js/jquery.formtips.1.2.5.js

1/*
2 * jQuery Form Tips 1.2.5
3 * By Manuel Boy (http://www.manuelboy.de)
4 * Copyright (c) 2011 Manuel Boy
5 * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
6*/
7
8jQuery.noConflict();
9var $form = jQuery;
10
11
12$form(document).ready(function() {
13
14    $form('form input.help, form textarea.help').formtips({
15        tippedClass: 'tipped'
16    });
17
18});
19
20
21
22(function($form){
23	
24	$form.fn.formtips = function(options) {
25	
26		// handle options
27		var settings = jQuery.extend({
28			tippedClass: "tipped"
29		}, options);
30	
31		return this.each(function() {
32			
33			// prepare input elements an textareas
34			var e = $form(this);
35			
36			// do not apply form tips to inputs of type file, radio or checkbox
37			var type = $form(e).attr('type');
38			if(type != 'file' && type != 'checkbox' && type != 'radio') {
39		
40				// handle focus event
41				$form(e).bind('focus', function() {
42					var lv = $form(this).attr('title');
43					if($form(this).val() == lv) {
44						$form(this).val('').removeClass(settings.tippedClass);
45					}
46					return true;
47				});
48		
49				// handle blur event
50				$form(e).bind('blur', function() {
51					var lv = $form(this).attr('title');
52					if($form(this).val() == '') {
53						$form(this).val(lv).addClass(settings.tippedClass);
54					}
55					return true;
56				});
57		
58				// handle initial text
59				var lv = $form(e).attr('title');
60				if($form(e).val() == '' || $form(e).val() == $form(this).attr('title')) {
61					$form(e).val(lv).addClass(settings.tippedClass);
62				} else {
63					$form(e).removeClass(settings.tippedClass);
64				}
65			
66				// handle removal of default value
67				$form(e).parentsUntil('form').parent().submit(function() {
68					var lv = $form(e).attr('title');
69					if($form(e).val() == lv) {
70						$form(e).val('').removeClass(settings.tippedClass);
71					}
72				});
73			
74			}
75		
76		});
77	};
78
79})(jQuery);