请教个动态创建JS的问题。。
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[待解决问题]
请教个问题，这是我的代码:
var head = document.getElementsByTagName("head")[0] || document.documentElement;
var script = document.createElement("script");
script.setAttribute("type", "text/javascript");
script.setAttribute("charset", "utf-8");
script.setAttribute("src", G(Q, b) + "&d=" + (new Date()).getTime());
script.onload = script.onreadystatechange = function() {
if (!this.readyState || this.readyState == "loaded" || this.readyState == "complete") {
script.onload = script.onreadystatechange = null;
if (head && script.parentNode) {
head.removeChild(script);
}
}
};
head.insertBefore(script, head.firstChild);
为什么我只要在head.insertBefore(script, head.firstChild);这句话前增加一个alert；下面的代码才会执行，不增加的话就是空白页面。。。请教了
所有回答(2)
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改为head.appendChild(script, head.firstChild);
（script.onload = script.onreadystatechange = 。。 ）这句 和head.appendChild(script, head.firstChild); （head.insertBefore(script, head.firstChild); ）这句换个顺序！
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setTimeout(funtion(){ head.insertBefore(script, head.firstChild);},10)
