三种动态加载js的jquery代码，jquery动态加载文件很方便，只需这样：$.getScript("test.js");即可。
来看完整的例子：
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312" />
<title>jquery 动态加载js的三种方法 - www.jbue.com</title>
//方法一
<script language="网页特效">
$.getscript("test.js");
//方法二
function loadjs(file){
var head = $('head').remove('#loadscript');
$("<scri"+"pt>"+"</scr"+"ipt>").attr({src:file,type:'text/javascript',id:'load'}).appendto(head);
}
//可以一行代码全部搞定：
//方法三
$("<scri"+"pt>"+"</scr"+"ipt>").attr({src:file,type:'text/javascript',id:'load'}).appendto($('head').remove('#loadscript'));
</script>
例2，动态加载js
<script language="javascript">
//动态加载js文件
//by www.jb200.com
$.extend({
includePath: '',
include: function(file) {
var files = typeof file == "string" ? [file]:file;
for (var i = 0; i < files.length; i++) {
var name = files[i].replace(/^s|s$/g, "");
var att = name.split('.');
var ext = att[att.length - 1].toLowerCase();
var isCSS = ext == "css";
var tag = isCSS ? "link" : "script";
var attr = isCSS ? " type='text/css' rel='stylesheet' " : " language='javascript' type='text/javascript' ";
var link = (isCSS ? "href" : "src") + "='" + $.includePath + name + "'";
if ($(tag + "[" + link + "]").length == 0) document.write("<" + tag + attr + link + "></" + tag + ">");
}
}
});
//使用方法
$.includePath = 'http://www.jb200.com/jb/js/';
$.include(['json2.js', 'jquery.tree.js', 'jquery.tree.css']);
</script>