[js]domready.js

domready.js

(function(namespace){
// local symbol
var _doc = document, _win = window, _ns = _win;
if (namespace) {
	var nsArr = namespace.split('.');
	for (var i = 0, l = nsArr.length; i < l; i++) {
		var ns = nsArr[i];
		if (typeof(_ns[ns]) == 'undefined') _ns[ns] = {};
		_ns = _ns[ns];
	}
}
var _domReady = {};
var isReady = false,
	bound = false,
	fnList = [];
_domReady.fire = function() {
	if(isReady) return;
	isReady = true;
	if (fnList) {
		for(var i = 0, l = fnList.length; i < l; i++) {
			fnList[i].call(_win, []);
		}
		fnList = [];
	}
};
_domReady.bindReady = function() {
	if (bound) return;
	bound = true;
	if (_doc.readyState === 'complete' ) {
		setTimeout(_domReady.ready, 1);
		return;
	}
	if (_doc.addEventListener) {
		_doc.addEventListener('DOMContentLoaded', _domReady.fire, false);
	} else if (_doc.attachEvent) {
		(function(){
			if (isReady) return;
			try {
				_doc.documentElement.doScroll('left');
			} catch(error) {
				setTimeout(arguments.callee, 0);
				return;
			}
			_domReady.fire();
		})();
	} else {
		var baseLoad = _win.onload;
		_win.onload = function() {
			if (baseLoad) {
				baseLoad();
			}
			_domReady.fire();
		};
	}
};
_domReady.ready = function(fn) {
	_domReady.bindReady();
	if (isReady) {
		fn.call(_win, []);
	} else {
		fnList.push(function() { return fn.call(_win, []); });
	}
};
//_domReady.bindReady();
_ns.ready = _domReady.ready;
})();