function getUrl(name, url) {
url = url || window.location.search;
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
var r = url.substr(1).match(reg);
if (r != null) return (r[2]);
return null;
}
getUrl(‘preject‘);
原文：https://www.cnblogs.com/bearSky/p/15168873.html