今天在看到某网站的js代码如下

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define("app/sInit",[],function(o){function n(){$(window).scrollTop()>500?$("#u-goTop").fadeIn():$("#u-goTop").fadeOut()}var t=/chrome/.test(navigator.userAgent.toLowerCase());t&&o.async("SmoothScroll"),$(".nav .item").hover(function(){clearTimeout(this.timer),$(this).find(".sub").show()},function(){var o=this;this.timer=setTimeout(function(){$(o).find(".sub").hide()},100)}),n(),$(window).scroll(function(){n()}),$("#u-goTop").on("click",function(){$("body,html").animate({scrollTop:0},500)})});

请大牛指导这是什么怎么加密的，加密成这样的代码还有被人解密吗？