https://neospaidagogos.gr/scripts/jquery-defaultvalue.js

1/**
2 * jQuery Default Value Plugin v1.0
3 * Progressive enhancement technique for inital input field values
4 *
5 * The MIT License
6 * 
7 * Copyright (c) 2007 Paul Campbell (pauljamescampbell.co.uk)
8 * 
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 * 
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 * 
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 *
27 * @param		String
28 * @return		Array
29 */
30(function($) {
31	
32	$.fn.defaultvalue = function() {
33		
34		// Scope
35		var elements = this;
36		var args = arguments;
37		var c = 0;
38		
39		return(
40			elements.each(function() {				
41				
42				// Default values within scope
43				var el = $(this);
44				var def = args[c++];
45
46				el.val(def).focus(function() {
47					if(el.val() == def) {
48						el.val("");
49					}
50					el.blur(function() {
51						if(el.val() == "") {
52							el.val(def);
53						}
54					});
55				});
56				
57			})
58		);
59	}
60})(jQuery)