79 |
From David Flanagan's, _Javascript:_The Definitive_Guide_, pg. 294-5, |
From David Flanagan's, _Javascript:_The Definitive_Guide_, pg. 294-5, |
80 |
published by O'Reilly, 4th edition, 2002 |
published by O'Reilly, 4th edition, 2002 |
81 |
*/ |
*/ |
82 |
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|
83 |
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var debug_div = null; |
84 |
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|
85 |
function debug(msg) |
function debug(msg) |
86 |
{ |
{ |
87 |
// return; // Disable debugging |
// return; // Disable debugging |
88 |
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|
89 |
var debug_div = element_id('debug'); |
if (! debug_div) debug_div = document.getElementById('debug'); |
90 |
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|
91 |
if (debug_div) debug_div.innerHTML += msg+"<br/>\n"; |
// this will create debug div if it doesn't exist. |
92 |
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if (! debug_div) { |
93 |
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debug_div = document.createElement('div'); |
94 |
|
document.body.appendChild(debug_div); |
95 |
|
} |
96 |
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if (debug_div) { |
97 |
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debug_div.appendChild(document.createTextNode(msg)); |
98 |
|
debug_div.appendChild(document.createElement("br")); |
99 |
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} |
100 |
} |
} |
101 |
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|
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// |
|
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|
|
102 |
// Convert a number into a base 62 alphanumeric number string |
// Convert a number into a base 62 alphanumeric number string |
103 |
function convert(num) |
function convert(num) |
104 |
{ |
{ |
160 |
|
|
161 |
// And tell it what URL to load |
// And tell it what URL to load |
162 |
xmldoc.load(url); |
xmldoc.load(url); |
163 |
|
return true; |
164 |
} |
} |
165 |
// Otherwise use Microsoft's proprietary API for Internet Explorer |
// Otherwise use Microsoft's proprietary API for Internet Explorer |
166 |
// Something about not following standards once again |
// Something about not following standards once again |
174 |
if (xmldoc.readyState == 4) handler(xmldoc, url, data, result_handler); |
if (xmldoc.readyState == 4) handler(xmldoc, url, data, result_handler); |
175 |
} |
} |
176 |
xmldoc.load(url); // Start loading! |
xmldoc.load(url); // Start loading! |
177 |
|
return true; |
178 |
|
} |
179 |
|
// else fallback on usage of iframes to load xml (Opera 7.53 without Java and maybe old Mac browsers) |
180 |
|
else { |
181 |
|
debug("using iframe xml loader - experimental and slow"); |
182 |
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if (! window.xml_iframe) { |
183 |
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debug("creating iframe"); |
184 |
|
window.xml_iframe = document.createElement('div'); |
185 |
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window.xml_iframe.innerHTML = '<iframe src="'+url+'" name="xml_iframe" height="0" width="0" style="display: none;"></iframe>'; |
186 |
|
document.body.appendChild(window.xml_iframe); |
187 |
|
} else { |
188 |
|
debug("loading xml in existing iframe"); |
189 |
|
window.frames.xml_iframe.window.document.location.href = url; |
190 |
|
} |
191 |
|
|
192 |
|
// set timeout to re-check if iframe is loaded |
193 |
|
window.iframe_timeout = window.setInterval('iframe_xml_loaded();',100); |
194 |
|
|
195 |
|
// save some data for iframe_xml_loaded() |
196 |
|
window.xml_handler = handler; |
197 |
|
window.xml_url = url; |
198 |
|
window.xml_data = data; |
199 |
|
window.xml_result_handler = result_handler; |
200 |
|
return true; |
201 |
} |
} |
202 |
|
clearTimeout(watchdog_id); |
203 |
|
debug("Browser incompatilibity: can't request XML document by one of supported methods"); |
204 |
|
return false; |
205 |
} |
} |
206 |
catch(ex) |
catch(ex) |
207 |
{ |
{ |
215 |
return true; |
return true; |
216 |
} |
} |
217 |
|
|
218 |
|
function iframe_xml_loaded() { |
219 |
|
debug("iframe_xmldoc_loaded"); |
220 |
|
if (! window.frames['xml_iframe']) return; |
221 |
|
var xml = eval('window.frames.xml_iframe.window.document'); |
222 |
|
if (xml) { |
223 |
|
clearTimeout(window.iframe_timeout); |
224 |
|
debug("calling handler with ("+window.xml_url+","+window.xml_data+",...)"); |
225 |
|
window.xml_handler(window.frames.xml_iframe.window.document, window.xml_url, window.xml_data, window.xml_result_handler); |
226 |
|
} else { |
227 |
|
debug("can't eval iframe with xml"); |
228 |
|
} |
229 |
|
} |
230 |
|
|
231 |
function loadData(xmldoc, url, pos, result_handler) |
function loadData(xmldoc, url, pos, result_handler) |
232 |
{ |
{ |
233 |
clearTimeout(watchdog_id); |
clearTimeout(watchdog_id); |