<!--

function checkOS() {
  if(navigator.userAgent.indexOf('Linux') != -1)
    { var OpSys = "Linux"; }
  else if((navigator.userAgent.indexOf('Win') != -1) &&
  (navigator.userAgent.indexOf('95') != -1))
    { var OpSys = "Windows95"; }
  else if(navigator.userAgent.indexOf('Win') != -1)
    { var OpSys = "Windows3.1 or NT"; }
  else if(navigator.userAgent.indexOf('Mac') != -1)
    { var OpSys = "Macintosh"; }
  else { var OpSys = "other"; }
  return OpSys;
}

var OpSys = checkOS();

beginRollover = false;// This handles a bug in Nav4.0x that executes the code too quickly.

// 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); 

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_nav2 = (is_nav && (is_major == 2)); 
var is_nav3 = (is_nav && (is_major == 3)); 
var is_nav4 = (is_nav && (is_major == 4)); 
var is_nav4up = (is_nav && (is_major >= 4)); 
var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) || 
                      (agt.indexOf("; nav") != -1)) ); 
var is_nav5 = (is_nav && (is_major == 5)); 
var is_nav5up = (is_nav && (is_major >= 5)); 

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); 
var isIE4, isIE4PC, isNav4PC, isNav4, isNav3;

if (is_ie4 || is_ie4up || is_nav5 || is_nav5up) {
	isIE4 = true;
	if (OpSys != "Macintosh") {
		isIE4PC = true;
	} 
} else if (is_nav4) {
	isNav4 = true;
	if (OpSys != "Macintosh") {
		isNav4PC = true;
	} 
} else if  (is_nav) {
	isNav3 = true;	
}

if (OpSys == "Linux") {
	document.write('<LINK REL="STYLESHEET" TYPE="text/css" HREF="linux.css" TITLE="ZDNet Planet Styles - Linux">');
} else {
	document.write('<LINK REL="STYLESHEET" TYPE="text/css" HREF="reg.css" TITLE="ZDNet Planet Styles">');
	if (isNav4PC) {
		document.write('<LINK REL="STYLESHEET" TYPE="text/css"ns.css" TITLE="ZDNet Planet Styles - Netscape">');
	}
}


//-->
 