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domready.js
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domready.js
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/*!
* Adaptation of the $(document).ready() function from jQuery
* library for use in simple JavaScript scenarios.
*
* ---------------------------------------------------------------------
* jQuery JavaScript Library v1.4.3
* http://jquery.com/
*
* Copyright (c) 2010 John Resig, http://jquery.com/
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* ----------------------------------------------------------------------
*/
var domReady = (function() {
var w3c = !!document.addEventListener,
loaded = false,
toplevel = false,
fns = [];
if (w3c) {
document.addEventListener("DOMContentLoaded", contentLoaded, true);
window.addEventListener("load", ready, false);
}
else {
document.attachEvent("onreadystatechange", contentLoaded);
window.attachEvent("onload", ready);
try {
toplevel = window.frameElement === null;
} catch(e) {}
if ( document.documentElement.doScroll && toplevel ) {
scrollCheck();
}
}
function contentLoaded() {
(w3c)?
document.removeEventListener("DOMContentLoaded", contentLoaded, true) :
document.readyState === "complete" &&
document.detachEvent("onreadystatechange", contentLoaded);
ready();
}
// If IE is used, use the trick by Diego Perini
// http://javascript.nwbox.com/IEContentLoaded/
function scrollCheck() {
if (loaded) {
return;
}
try {
document.documentElement.doScroll("left");
}
catch(e) {
window.setTimeout(arguments.callee, 15);
return;
}
ready();
}
function ready() {
if (loaded) {
return;
}
loaded = true;
var len = fns.length,
i = 0;
for( ; i < len; i++) {
fns[i].call(document);
}
}
return function(fn) {
// if the DOM is already ready,
// execute the function
return (loaded)?
fn.call(document):
fns.push(fn);
}
})();