判断来访域名，来跳转，以前的location.hostname在IE9后的版本不起作用。
<script language="javascript" type="text/javascript">
if(String(window.location.href).indexOf("www.lunji.com") < 0)
window.location.href="https://www.lunji.com/";
</script>
if(String(window.location.href).indexOf("www.lunji.com") < 0)
window.location.href="https://www.lunji.com/";
</script>