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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
|
// $Id$
/**
* Only enable Javascript functionality if all required features are supported.
*/
function isJsEnabled() {
if (typeof document.jsEnabled == 'undefined') {
// Note: ! casts to boolean implicitly.
document.jsEnabled = !(
!document.getElementsByTagName ||
!document.createElement ||
!document.createTextNode ||
!document.documentElement ||
!document.getElementById);
}
return document.jsEnabled;
}
// Global Killswitch on the <html> element
if (isJsEnabled()) {
document.documentElement.className = 'js';
}
/**
* Make IE's XMLHTTP object accessible through XMLHttpRequest()
*/
if (typeof XMLHttpRequest == 'undefined') {
XMLHttpRequest = function () {
var msxmls = ['MSXML3', 'MSXML2', 'Microsoft']
for (var i=0; i < msxmls.length; i++) {
try {
return new ActiveXObject(msxmls[i]+'.XMLHTTP')
}
catch (e) { }
}
throw new Error("No XML component installed!");
}
}
/**
* Creates an HTTP GET request and sends the response to the callback function.
*
* Note that dynamic arguments in the URI should be escaped with encodeURIComponent().
*/
function HTTPGet(uri, callbackFunction, callbackParameter) {
var xmlHttp = new XMLHttpRequest();
var bAsync = true;
if (!callbackFunction) {
bAsync = false;
}
xmlHttp.open('GET', uri, bAsync);
xmlHttp.send(null);
if (bAsync) {
if (callbackFunction) {
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4) {
callbackFunction(xmlHttp.responseText, xmlHttp, callbackParameter);
}
}
}
return xmlHttp;
}
else {
return xmlHttp.responseText;
}
}
/**
* Creates an HTTP POST request and sends the response to the callback function
*
* Note: passing null or undefined for 'object' makes the request fail in Opera 8.
* Pass an empty string instead.
*/
function HTTPPost(uri, callbackFunction, callbackParameter, object) {
var xmlHttp = new XMLHttpRequest();
var bAsync = true;
if (!callbackFunction) {
bAsync = false;
}
xmlHttp.open('POST', uri, bAsync);
var toSend = '';
if (typeof object == 'object') {
xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
for (var i in object) {
toSend += (toSend ? '&' : '') + i + '=' + encodeURIComponent(object[i]);
}
}
else {
toSend = object;
}
xmlHttp.send(toSend);
if (bAsync) {
if (callbackFunction) {
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4) {
callbackFunction(xmlHttp.responseText, xmlHttp, callbackParameter);
}
}
}
return xmlHttp;
}
else {
return xmlHttp.responseText;
}
}
/**
* Redirects a button's form submission to a hidden iframe and displays the result
* in a given wrapper. The iframe should contain a call to
* window.parent.iframeHandler() after submission.
*/
function redirectFormButton(uri, button, handler) {
// Make sure we have an iframe to target
createIframe();
// Trap the button
button.onmouseover = button.onfocus = function() {
button.onclick = function() {
// Prepare variables for use in anonymous function.
var button = this;
var action = button.form.action;
var target = button.form.target;
// Redirect form submission
this.form.action = uri;
this.form.target = 'redirect-target';
handler.onsubmit();
// Set iframe handler for later
window.iframeHandler = function () {
var iframe = $('redirect-target');
// Restore form submission
button.form.action = action;
button.form.target = target;
// Get response from iframe body
try {
response = (iframe.contentWindow || iframe.contentDocument || iframe).document.body.innerHTML;
// Firefox 1.0.x hack: Replace control characters
response = response.replace(/[\f\n\r\t\v]/g, ' ');
if (window.opera) {
// Opera-hack: it returns innerHTML sanitized.
response = response.replace(/"/g, '"');
}
}
catch (e) {
response = null;
}
// Recreate the iframe: re-using an old iframe can sometimes cause browser bugs.
createIframe();
response = parseJson(response);
// Check response code
if (response.status == 0) {
handler.onerror(response.data);
return;
}
handler.oncomplete(response.data);
}
return true;
}
}
button.onmouseout = button.onblur = function() {
button.onclick = null;
}
}
/**
* Adds a function to the window onload event
*/
function addLoadEvent(func) {
var oldOnload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
}
else {
window.onload = function() {
oldOnload();
func();
}
}
}
/**
* Adds a function to a given form's submit event
*/
function addSubmitEvent(form, func) {
var oldSubmit = form.onsubmit;
if (typeof oldSubmit != 'function') {
form.onsubmit = func;
}
else {
form.onsubmit = function() {
return oldSubmit() && func();
}
}
}
/**
* Retrieves the absolute position of an element on the screen
*/
function absolutePosition(el) {
var sLeft = 0, sTop = 0;
var isDiv = /^div$/i.test(el.tagName);
if (isDiv && el.scrollLeft) {
sLeft = el.scrollLeft;
}
if (isDiv && el.scrollTop) {
sTop = el.scrollTop;
}
var r = { x: el.offsetLeft - sLeft, y: el.offsetTop - sTop };
if (el.offsetParent) {
var tmp = absolutePosition(el.offsetParent);
r.x += tmp.x;
r.y += tmp.y;
}
return r;
};
function dimensions(el) {
return { width: el.offsetWidth, height: el.offsetHeight };
}
/**
* Returns true if an element has a specified class name
*/
function hasClass(node, className) {
if (node.className == className) {
return true;
}
var reg = new RegExp('(^| )'+ className +'($| )')
if (reg.test(node.className)) {
return true;
}
return false;
}
/**
* Adds a class name to an element
*/
function addClass(node, className) {
if (hasClass(node, className)) {
return false;
}
node.className += ' '+ className;
return true;
}
/**
* Removes a class name from an element
*/
function removeClass(node, className) {
if (!hasClass(node, className)) {
return false;
}
node.className = eregReplace('(^| )'+ className +'($| )', '', node.className);
return true;
}
/**
* Toggles a class name on or off for an element
*/
function toggleClass(node, className) {
if (!removeClass(node, className) && !addClass(node, className)) {
return false;
}
return true;
}
/**
* Emulate PHP's ereg_replace function in javascript
*/
function eregReplace(search, replace, subject) {
return subject.replace(new RegExp(search,'g'), replace);
}
/**
* Removes an element from the page
*/
function removeNode(node) {
if (typeof node == 'string') {
node = $(node);
}
if (node && node.parentNode) {
return node.parentNode.removeChild(node);
}
else {
return false;
}
}
/**
* Prevents an event from propagating.
*/
function stopEvent(event) {
if (event.preventDefault) {
event.preventDefault();
event.stopPropagation();
}
else {
event.returnValue = false;
event.cancelBubble = true;
}
}
/**
* Parse a JSON response.
*
* The result is either the JSON object, or an object with 'status' 0 and 'data' an error message.
*/
function parseJson(data) {
if (data.substring(0,1) != '{') {
return { status: 0, data: data.length ? data : 'Unspecified error' };
}
return eval('(' + data + ');');
}
/**
* Create an invisible iframe for form submissions.
*/
function createIframe() {
// Delete any previous iframe
deleteIframe();
// Note: some browsers require the literal name/id attributes on the tag,
// some want them set through JS. We do both.
window.iframeHandler = function () {};
var div = document.createElement('div');
div.id = 'redirect-holder';
div.innerHTML = '<iframe name="redirect-target" id="redirect-target" class="redirect" onload="window.iframeHandler();"></iframe>';
var iframe = div.firstChild;
with (iframe) {
name = 'redirect-target';
setAttribute('name', 'redirect-target');
id = 'redirect-target';
}
with (iframe.style) {
position = 'absolute';
height = '1px';
width = '1px';
visibility = 'hidden';
}
document.body.appendChild(div);
}
/**
* Delete the invisible iframe for form submissions.
*/
function deleteIframe() {
var holder = $('redirect-holder');
if (typeof holder != 'undefined') {
removeNode(holder);
}
}
/**
* Wrapper around document.getElementById().
*/
function $(id) {
return document.getElementById(id);
}
|
