jquery如何獲取url中問號后面的數值

假如路徑是這樣的：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;
};