ns4 = (document.layers)? true:false
ns6 = (document.addEventListener)?true:false;
ie4 = (document.all && !document.getElementById)? true:false
ie5 = (document.all && document.getElementById)? true:false

if ( navigator.userAgent.indexOf("Mac") != -1 )
{
	document.write('<LINK REL="stylesheet" HREF="/css/basic/moz.css" TYPE="text/css">'); 
}
	else if(navigator.userAgent.indexOf("Opera") != -1)
	{
        document.write('<LINK REL="stylesheet" HREF="/css/basic/moz.css" TYPE="text/css">');
        }
		else if(ns4)
		{
			document.write('<LINK REL="stylesheet" HREF="/css/basic/moz.css" TYPE="text/css">'); 
		}
			else if(ns6)
			{
				document.write('<LINK REL="stylesheet" HREF="/css/basic/moz.css" TYPE="text/css">'); 
			} 
				else
				{
					document.write('<LINK REL="stylesheet" HREF="/css/basic/ie.css" TYPE="text/css">');
				}