browser = navigator.appName;
appVer = parseInt(navigator.appVersion);
ie = "Microsoft Internet Explorer";
ns = "Netscape";
if (navigator.appVersion.indexOf("Macintosh") != -1) {
	window.isMac = true;
} else {
	window.isMac = false;
} 
   
function adjustFont() {
	if (!isMac) {
		var elem = document.getElementById('txt');
		elem.style.letterSpacing='-1px';
		elem.style.fontSize='11px';
	}
}