Dom ready @恨宸

//JavaScript DOM Ready
//Author: 风吟 ( ganquan.info )
//Released under the MIT license.
(function(document) {
window.domReady = function(callback) {
var is_Ready = false,
regex = /loaded|complete/i,
ua = navigator.userAgent,
event = document.addEventListener ? true: false;
if (is_Ready) return fn.call(document, this);
function doReady() {
if (!is_Ready) {
callback();
is_Ready = true;
}
}
if (event) {
document.addEventListener('DOMContentLoaded', doReady, false);
} else { (function() {
try {
document.documentElement.doScroll('left');
} catch(e) {
setTimeout(arguments.callee, 50);
return;
}
doReady();
})()
}
(function() {
if (regex.test(document.readyState)) {
doReady();
return;
} else {
setTimeout(arguments.callee, 50);
}
})()
if (document.addEventListener) {
window.addEventListener("load", doReady, false);
} else if (document.attachEvent) {
window.attachEvent("onload", doReady);
} else {
window.onload = doReady;
}
}
})(document);