JS獲取地址欄參數

//獲取URL參數
function getQueryString(name) {
var reg = new RegExp("(^|/?|&)" + name + "=([^&]*)(&|$)", "i");
var r = decodeURIComponent(location.href).substr(1).match(reg);
if (r != null) return r[2];
return null;
}