$domain=ereg_replace('[^\.]*\.(.*)$','\1',$_SERVER['HTTP_HOST']);
$group_name=ereg_replace('([^\.]*)\..*$','\1',$_SERVER['HTTP_HOST']);
$domain=ereg_replace('[^\.]*\.(.*)$','\1',$_SERVER['HTTP_HOST']);
$group_name=ereg_replace('([^\.]*)\..*$','\1',$_SERVER['HTTP_HOST']);