我的源代码:
<!doctype html>
<html>
<head>
<title>onload test</title>
<link type="text/css" rel="stylesheet" href="spot.css" media="screen" />
</head>
<body>
<h1>Welcome Page</h1>
<script>
debugger;
function constructScripts(url, callBack) {
var script = document.createElement("script");
script.type = "text/javascript";
script.src = url;
document.getElementsByTagName("head")[0].appendChild(script);
if (script.readyState) {
script.onreadystatechange = function () {
if (script.readyState == "loaded" || script.readyState == "complete") {
script.onreadystatechange = null; callBack();
}
};
}
else {
script.onload = callBack;
}
}
</script>
<script>
debugger;
myCallBack = function () {
alert(this.src + "loaded");
}
constructScripts("files1", myCallBack);
constructScripts("files2", myCallBack);
constructScripts("files3", myCallBack);
</script>
</body>
</html>
this.src 在这里未定义。我想这应该是一个“脚本”对象,它应该具有它的 src 属性,以便我可以读取文件名。这里的“这个”是谁?而且当我查看页面源代码时,这些脚本不包含在 header() 部分中。为什么会这样?谢谢。