$(document).ready(function(){
	    NProgress.start();
	    NProgress.done();
}
var oldScrollNum = 0;
	window.onscroll = function(){
		var t = document.documentElement.scrollTop || document.body.scrollTop;
		//下滑
		if (t>oldScrollNum) {

		//上拉
		}else{

		}
		oldScrollNum = t;
	}