在JS内部动态加载JS

jQuery

$.getscript()

jQuery.loadscript = function (url, callback) {    jQuery.ajax({        url: url,        dataType: 'script',        success: callback,        async: true    });}

并像这样使用它：

if (typeof someObject == 'undefined') $.loadscript('url_to_somescript.js', function(){    //Stuff to do after somescript has loaded});