define([], function(){
function onReady(fn) {
var DOC = document,
html = DOC.documentElement,
W3C = document.dispatchEvent;
//FF以前是没有readyState属性的
//判断body是否存在来决定DOM文档是否加载完毕
if (!DOC.readyState) {
var readyState = DOC.readyState = DOC.body ? "complete" : "loading";
}
//如果页面已经完全载入完毕直接执行回调函数
if (DOC.readyState === "complete") {
setTimeout(fn);
//现代游览器和IE>=IE9
} else if (W3C) {
DOC.addEventListener('DOMContentLoaded', function(){
if (readyState) {
DOC.readyState = 'complete';
}
fn();
}, false);
} else {
ieReady(fn);
}
}
function ieReady(fn) {
try {
//处理iframe中的页面在IE下无法通过doScroll判断DOM知否加载完毕
if (self !== top && self.document.readyState !== 'complete') {
setTimeout(function(){
ieReady.call(window, fn)
})
} else if (self !== top && self.document.readyState === 'complete') {
arguments[0]();
} else {
document.documentElement.doScroll('left');
arguments[0]();
}
} catch (e) {
setTimeout(function(){
ieReady.call(window, fn)
})
}
};
AS.extend({
'onReady': onReady
});
return onReady;
})