javascript中动态加载js文件多种解决办法总结

/*
    动态加载js v1.0 by：dum
    用法：src="webJsBase.js?load=a,b"
    注：加载本目录下js
*/
var webJsBase = {
    require: function(libraryName) {
        document.write('<script type="text/javascript" src="'+libraryName+'"></script>');
    },
    load: function(defaultLoad) {
        if((typeof Prototype=='undefined')||(typeof Element == 'undefined')||(typeof Element.Methods=='undefined'))
        throw ('prototype lib 加载失败！');
        if(typeof defaultLoad=='undefined')defaultLoad='';
        var js = /webJsBase.js(?.*)?$/;
        $$('head script[src]').findAll(function(s) {
            return s.src.match(js);
        }).each(function(s) {
            var path = s.src.replace(js, '');
            var includes = s.src.match(/?.*load=([a-zA-Z0-9_,]*)/);
            (includes ? includes[1] : defaultLoad).split(',').each(function(include) {
                webJsBase.require(path + include + '.js');
            });
        });
    }
};
webJsBase.load(); //这里参数可以指定默认要加载的js文件

<script language="javascript">

    document.write("<script src='test.js'></script>");

</script>

<script src='' id="s1"></script>

<script language="javascript">

    s1.src="test.js"

</script>

<script>

    var oHead = document.getElementsByTagName('HEAD').item(0);

    var oScript= document.createElement("script");

    oScript.type = "text/javascript";

    oScript.src="test.js";

    oHead.appendChild( oScript);

</script>

function include(src) {
HTMLCode = '<script language="javascript" src="' + src + '"></script>';
document.write(HTMLCode);
}

include(baseDir + "/Prototype.js");
include(baseDir + "/Map.js");
include(baseDir + "/MapEvent.js");

include(baseDir + "/model/MapModel.js");
include(baseDir + "/model/MapType.js");
include(baseDir + "/model/Tile.js");