var agent = navigator.userAgent ;
	var appve = navigator.appVersion ;
	var appna = navigator.appName ;

	var userOs = null ;
	var browser = null ;
	var version = null ;

	if ( agent.indexOf('Win') != -1 ){
			userOs = "Win";
	}else if ( agent.indexOf('Mac') != -1 ){
			userOs = "Mac" ;
	}else{
			userOs = "Other" ;
	}

	if ( agent.indexOf('Opera') != -1 ){
			browser = "OPERA";
			version = agent.substring((agent.indexOf('Opera') + 6),(agent.indexOf('Opera') + 7)) ;
	}else if ( appna == "Safari" ){
			browser = "Safari";
			version = agent.substring((agent.indexOf('Safari') + 5),(agent.indexOf('Safari') + 8)) ;
	}else if ( appna == "Microsoft Internet Explorer" ){
			browser = "IE";
			version = agent.substring((agent.indexOf('MSIE') + 5),(agent.indexOf('MSIE') + 8)) ;
	}else if ( appna == "Netscape" ){
			browser = "NN";
			version = appve.substring( 0,1 ) ;
	}
	if ( userOs == "Win" && ( browser == "IE" && version >= 5 ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Win" && ( browser == "NN" && version == 4 ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet_win_nn4.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Win" && ( browser == "OPERA" && version >= 6 ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Win" )
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Mac" && ( browser == "IE" && version >= 5 ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet_mac_ie5.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Mac" && ( browser == "NN" && version == 4 ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet_mac_nn4.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Mac" && ( browser == "Safari" ))
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet_mac_safari.css\" TYPE=\"text/css\">"); 
	}
	else if ( userOs == "Mac" )
	{

		document.write("<LINK REL=stylesheet HREF=\"/css/sweet.css\" TYPE=\"text/css\">"); 
	}
	else
	{
		document.write("<LINK REL=stylesheet HREF=\"/css/sweet.css\" TYPE=\"text/css\">"); 
	}