原生js實現document.ready效果

直接上代碼：

(function ()<br />{ var ie = !!(window.attachEvent && !window.opera);<br />var wk = /webkit//(/d+)/i.test(navigator.userAgent) && (RegExp.$1 < 525);<br />var fn = [];<br />var run = function ()<br />{<br />for (var i = 0; i < fn.length; i++) fn[i]();<br />};<br />var d = document;<br />d.ready = function (f)<br />{<br />if (!ie && !wk && d.addEventListener)<br />return d.addEventListener('DOMContentLoaded', f, false);<br />if (fn.push(f) > 1) return;<br />if (ie) (function ()<br />{<br />try {<br />d.documentElement.doScroll('left');<br />run();<br />}<br />catch (err)<br />{<br />setTimeout(arguments.callee, 0);<br />}<br />}<br />)();<br />else if (wk)<br />var t = setInterval(function ()<br />{<br />if (/^(loaded|complete)$/.test(d.readyState))<br />clearInterval(t), run();<br />}, 0);<br />};<br />})(); </p><p>//usage<br />document.ready(function(){check_radio();});