依赖加载简单实现方式 function loadScript(url, callback) { var script = document.createElement("script" ); script.type = "text/javascript" ; script.src = url; document.getElementById( "srciptCode" ).appendChild(script); script.onload = function () { callback(); } } loadScript( "../js/jquery-1.8.3.min.js", function (){ console.log( "jquery-1.8.3.min.js ok" ) loadScript( "../js/jquery.qrcode.min.js", function (){ console.log( "jquery.qrcode.min.js ok" ) loadScript( "../js/ui.min.js?0107", function (){ console.log( "ui.min.js ok" ) loadScript( "../js/activity/code.min.js?0107", function (){ console.log(