jquery如何获取url中问号后面的数值

假如路径是这样的：www.domain.com/list/?menu=1

var locationUrl = location.search.substring(6);

switch(locationUrl) {
case "1":
$(".zxdt").click();
break;
case "2":
$(".xwzx").click();
break;
case "3":
$(".mtzx").click();
break;
};