你应该查看jquerys 时

Your should look in to jquerys when

允许您在执行多个异步（ajax）方法后执行代码。

Will allow you to execute code after multiple async (ajax) methods are done executing.

从jquery文档：

描述：提供一种基于一个
或更多对象执行回调函数的方法，通常是Deferred对象表示异步
事件。

Description: Provides a way to execute callback functions based on one or more objects, usually Deferred objects that represent asynchronous events.

https://api.jquery.com/jquery.when/

至于要执行的脚本在运行代码之前，jquery有一个解决方案; getScripts

$.getScript("jquery.cookie.js")
    .done(function() {
        jQuery.cookie("cookie_name", "value", { expires: 7 });
});

加载多个脚本并在运行代码之前执行它们，方法是结合 getScript 和何时

Load multiple scripts and execute them before running your code by combining getScript and when

$.when(
    $.getScript( "/script1.js" ),
    $.getScript( "/script2.js" ),
    $.Deferred(function( deferred ){
        $( deferred.resolve );
    })
).done(function(){

    // your code

});

另一种方法：

var scripts = ['script1.js','script2.js','script3.js'];
$.getScript(scripts, function(data, textStatus) {
    //do something after all scripts have loaded
});

参考： http://www.sitepoint.com/getscript-mutiple-scripts/