functiongetParameterByName(name, url) {
if (!url) url =window.location.href;
// name =name.replace(/[
]/g, "\\$&"); 这句老是出错,猜测是用来去掉一些斜线的,先注释掉
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return'';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}