<!DOCTYPE html>
<html>
<head>
<base href="http://example.com/sample/">
<meta charset="UTF-8">
<title>A Elements - Spider HTML Parser</title>
</head>
<body>

<a href="//a.example.com/base/scheme" ping="//ping.example.com/base/scheme">sub-domain using base scheme</a><br />
<a href="http://a.example.com:8000/b" ping="http://ping.example.com:8000/b">sub-domain (http)</a><br />
<a href="https://a.example.com/c?a=b#fragment" ping="https://ping.example.com/c?a=b#fragment">sub-domain (https)</a><br />
<a href="a/re