1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/**
* Javascript code for attaching an onkeydown listener to textarea and
* text input elements to prevent loss of data when the user hits the
* ESC key.
*
* $Horde: horde/js/ieEscGuard.js,v 1.1.2.3 2005/10/18 11:33:38 jan Exp $
*
* See the enclosed file COPYING for license information (LGPL). If you did not
* receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*/
/* This code is only relevant for IE. Therefore try not to do anything
* if the user isn't using IE, even if this script is included. This
* check will catch some browsers that are not IE but identify
* themselves as IE. Hopefully if they pass through they support what
* IE supports. */
if (navigator.appVersion.indexOf('MSIE') != -1 && document.all) {
/* We do everything onload so that the entire document is present
* before we start searching it. */
window.attachEvent('onload', guard);
}
/**
* Finds all text inputs (input type="text") and textarea tags, and
* attaches the onkeydown listener to them to avoid ESC clearing the
* text.
*/
function guard()
{
/* Finds all textareas. */
var textareas = document.all.tags('TEXTAREA');
for (var i = 0; i < textareas.length; i++) {
textareas[i].attachEvent('onkeydown', disableEscape);
}
/* Finds _all_ <input> tags. */
var inputs = document.all.tags('INPUT');
for (var i = 0; i < inputs.length; i++) {
/* Only attach to <input type="text"> tags. */
if (inputs[i].type == 'text') {
inputs[i].attachEvent('onkeydown', disableEscape);
}
}
}
/**
* Returns false if the user hit the ESC key, preventing IE from
* blanking the field. Otherwise returns true.
*
* return boolean Whether or not to allow the key event.
*/
function disableEscape()
{
return window.event.keyCode != 27;
}
|
