var OpSys="Other";

var vers = navigator.appVersion;

if (navigator.appName == "Microsoft Internet Explorer") {
 pos = vers.lastIndexOf('.'); // find last period (the dot like in 3.0)
 vers = vers.substring(pos-1,vers.length); // eliminate everything before pos-1
}

vers = parseFloat(vers); // pick the number off the front of vers

if(navigator.userAgent.indexOf('Win')!=-1){

	if (navigator.userAgent.indexOf('95')!=-1){
			OpSys="Windows95";
			whichbrowser(OpSys,vers) 
		}
        else if(navigator.userAgent.indexOf('98')!=-1){
			OpSys="Windows95";
			whichbrowser(OpSys,vers)  
		}
        else if(navigator.userAgent.indexOf('Win')!=-1){
			OpSys="Windows3.1 or NT";
			whichbrowser(OpSys,vers) 
		}


}
    
else if(navigator.userAgent.indexOf('Mac') != -1){
	OpSys="Macintosh";
	whichbrowser(OpSys,vers) 		
	//put link to other style here    
}


function whichbrowser(opsystem,opversion){
	
//document.write('opsystem==' & opsystem & " opversion == " & opversion)

	if (navigator.appName == "Microsoft Internet Explorer" && opsystem=="Macintosh"){
			if (opversion <5){
			document.write('<link href="mac_ie4.css" rel="STYLESHEET" type="text/css">'); 		
			}else if(navigator.userAgent.indexOf('MSIE 5.17') != -1 || opversion >5){
			document.write('<link href="mac_ie.css" rel="STYLESHEET" type="text/css">');
			}else{
			}
		}	

	else if (navigator.appName == "Netscape" && opsystem=="Macintosh" && opversion < 5){
		document.write('<link href="mac_ns4.css" rel="STYLESHEET" type="text/css">'); 
		}
		
		// Mac and Netscape 5 or above - ie Netscape 6

else if (navigator.appName == "Netscape" && opsystem=="Macintosh"){
				document.write('<link href="mac_ns7.css" rel="STYLESHEET" type="text/css">'); 
        }
		// not mac assume windows
	else if (navigator.appName == "Microsoft Internet Explorer"){
		document.write('<link href="explorer_win.css" rel="STYLESHEET" type="text/css">'); 			
		}
	else if (opversion < 5) {	
		document.write('<link href="pc_ns4.css" rel="STYLESHEET" type="text/css">'); 
		}
	else{	
		document.write('<link href="pc_ns7.css" rel="STYLESHEET" type="text/css">');
		}
}