前几天购买了个程序，发现这个程序不用再网站目录下直接就可以绑定二级域名。最后了解是使用的js跳转的。
二级域名绑定目录方法（一）：
二级域名绑定的方法非常之简单，在域名设置的A记录下，设置好域名如x.123.com绑定ip先，然后到服务器相关目录下绑定域名x.123.com即可。这是传统的方法。
另外一种方法就是判断来源，访问相应目录，用js、asp、php代码实现。
JS实现多域名同一空间不同目录的代码: 包括了asp、php、js各种形式（二）。
<script language=javascript>
url=window.location.href
if(url.indexOf("201job.com")!=-1)
location="fs"
if(url.indexOf("fs.201job.com")!=-1)
location="xinhuirc"
if(url.indexOf("www.xinhuirc.com")!=-1)
location="index.html"
</script>
php实现多域名同一空间不同目录的代码:
<?php
$domain1="201job.com";
$domain2="fs.201job.cn";
$domain3="www.xinhuirc.com";
$dot1="index.php";
$dot2="movie";
$dot3="blog";
if(($HTTP_HOST=="$domain1")or($HTTP_HOST=="www.$domain1"))
{
Header("Location: $dot1");
}
elseif(($HTTP_HOST=="$domain2")or($HTTP_HOST=="www.$domain2"))
{
Header("Location: $dot2");
}
else(($HTTP_HOST=="$domain3")or($HTTP_HOST=="www.$domain3"))
{
Header("Location: $dot3");
}
?>
JSP实现多域名同一空间不同目录的代码:
<SCRIPT>try { if( self.location == "http://www.201job.com/" ) {
top.location.href = "http://www.201job.com/";
}
else if( self.location == "http://www.xinhuirc.com/" ) {
top.location.href = "http://www.xinhuirc.com/job";
}
else if( self.location == "http://fs.201job.com/" ) {
top.location.href = "http://fs.201job.com/job";
}
else { document.write ("404.html") } } catch(e) { }</SCRIPT>
ASP实现多域名同一空间不同目录的代码:
解决方案一(case)
<%
host=lcase(request.servervariables("HTTP_HOST"))
Select CASE host
CASE "www.201job.com"
response.redirect"index.html"
CASE "201job.com"
response.redirect"index.html"
CASE "www.xinhuirc.com"
response.redirect"movie/"
CASE "xinhuirc"
response.redirect"movie/"
CASE "fs.201job.com"
response.redirect"blog/"
CASE "cothurn.com"
response.redirect"blog/"
CASEELSE
response.redirect"404.html"
END Select
%>
解决方案二(if)
<%if Request.ServerVariables("SERVER_NAME")="www.201job.com" then
response.redirect "index.html"
elseif Request.ServerVariables("SERVER_NAME")="www.xinhuirc.com"
response.redirect "movie"
else Request.ServerVariables("SERVER_NAME")="fs.201job.com"
response.redirect "blog"
end if%>
解决方案三(Transfer)完全隐藏式，这个很好
<%
select case request.servervariables("http_host")
case "www.201job.com" '1
Server.Transfer("index.html")
case "www.xinhuirc" '2
Server.Transfer("movie")
case "fs.201job.com" '3
Server.Transfer("blog")
end select
%>
解决方案四(instr)
<%if instr(Request.ServerVariables
("SERVER_NAME"),"201job.com")>0 then
response.redirect "index.html"
elseif instr(Request.ServerVariables
("SERVER_NAME"),"xinhuirc")>0 then
response.redirect "movie"
else instr(Request.ServerVariables
("SERVER_NAME"),"201job.com")>0 then
response.redirect "blog"
end if
%>
方法来源：http://blog.163.com/dollare@126/blog/static/36611490201221393429612/
