个必须要有，不然不能运行虚拟主机
  NameVirtualHost *:80
 
  然后设置：
  <VirtualHost *:80>
  DirectoryIndex default.php
  ServerName "www.host1.com"
  DocumentRoot "D:/wwwroot/host1/"
  ErrorLog "H:/log/host1.log"
  TransferLog "H:/log/host1access.log"
  </VirtualHost>
  <VirtualHost *:80>
  DirectoryIndex default.php
  ServerName "www.host2.com"
  DocumentRoot "E:/wwwroot/host2/"
  ErrorLog "H:/log/host2.log"
  TransferLog "H:/log/host2access.log"
  </VirtualHost>