var cssDir = "";
var stylePrefix = "";

var winNSCSS 	= "style2.win_ns.css";
var winIECSS 	= "style2.win_ie.css";
var macCSS 		= "style2.mac.css";
var unixCSS 	= "style2.unix.css";



// *************************************************************
//  CLIENT_SIDE SNIFFER CODE
// *************************************************************
// convert all characters to lowercase to simplify testing 
var agt=navigator.userAgent.toLowerCase(); 

// *** BROWSER VERSION *** 
// Note: On IE5, these return 4, so use is_ie5up to detect IE5. 
var is_major = parseInt(navigator.appVersion); 
var is_minor = parseFloat(navigator.appVersion); 

// *** BROWSER TYPE *** 
var is_nav  	= ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) && (agt.indexOf('webtv')==-1));
var is_nav4up	= (is_nav && (is_major >= 4));  
var is_ie		= (agt.indexOf("msie") != -1); 
var is_ie3		= (is_ie && (is_major < 4)); 
var is_ie4		= (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) );
var is_ie4up	= (is_ie  && (is_major >= 4));
var is_ie5		= (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );  
var is_ie5up	= (is_ie  && !is_ie3 && !is_ie4);  

// *** PLATFORM ***
var is_win		= ((agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
var is_mac		= (agt.indexOf("mac")!=-1);
var is_sun		= (agt.indexOf("sunos")!=-1);
var is_irix		= (agt.indexOf("irix") !=-1);    // SGI
var is_hpux		= (agt.indexOf("hp-ux")!=-1);
var is_aix		= (agt.indexOf("aix") !=-1);      // IBM
var is_linux	= (agt.indexOf("inux")!=-1);
var is_sco		= (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
var is_mpras	= (agt.indexOf("ncr")!=-1); 
var is_reliant  = (agt.indexOf("reliantunix")!=-1);
var is_dec 		= ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
var is_sinix	= (agt.indexOf("sinix")!=-1);
var is_freebsd	= (agt.indexOf("freebsd")!=-1);
var is_bsd		= (agt.indexOf("bsd")!=-1);
var is_unix		= ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || is_sco ||is_unixware || is_mpras || is_reliant || is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

                         
//  Select the appropriate stylesheet
if ((is_nav4up || is_ie4up) || (!is_nav && !is_ie)) {
	path = ChooseStyleSheet();
}

// Function to choose the style sheet for use based on the platform
// and browser version
function ChooseStyleSheet() {
	var fileHead = cssDir + stylePrefix;
	var styles;
	if (is_win) {
		if (is_nav) {
			styles = fileHead + winNSCSS;
		} else {
			// Windows Netscape fonts need to be larger than those for IE
			styles = fileHead + winIECSS;
		}
	} else if (is_mac) {
		if (is_ie5up) {
			// Default font settings for Mac IE5 match PC IE fonts
			styles = fileHead + winIECSS;
		} else {
			styles = fileHead + macCSS;
		}
	} else if (is_unix) {
		styles = fileHead + unixCSS;
	} else {
		// Default style = macCSS
		// Macintosh stylesheets have the largest font sizes, which
		// will ensure readability
		styles = fileHead + macCSS;
	}
	return styles;
}