javascript获取host

document.writeln(location.protocol);

document.writeln(location.origin);　　//包括端口号

document.writeln(location.host);　　　　//不包括端口号

document.writeln(location.port);         //默认为80的就为空

document.writeln(location.pathname);

 

<a href="<%=location.origin%>/membership/member/detail?member_id=<%= item.member_id %>">