function getOS() {
	var char1 = navigator.appVersion.indexOf('(')+1;
	var char2 = navigator.appVersion.indexOf(';');
	whichOS = navigator.appVersion.substring(char1,char2);
	return whichOS;
}

function getVersion() {
	for(i = 0; i < 100; i++) {
		var whichChar = navigator.appVersion.charAt(i);
		if((whichChar == '.') || (whichChar == '0') || (whichChar == '1') || (whichChar == '2') || (whichChar == '3') || (whichChar == '4') || (whichChar == '5') || (whichChar == '6') || (whichChar == '7') || (whichChar == '8') || (whichChar == '9')){				
		}
		else{					
			break;
		}
	}
	whichVersion = navigator.appVersion.substring(0,i);
	return whichVersion;
}

var isNav4 = isIE4 = 0;

function getBrowser() {
	if(eval(navigator.appVersion.charAt(0)) >= 4) {
		if(navigator.appName == "Netscape") {
			isNav4 = true;
		} else if(navigator.appVersion.indexOf("MSIE") != -1) {
			isIE4 = true;
		}
	}
}

function getCD() {
	whichCD = screen.colorDepth;
	if(whichCD==18){
		whichCD=8;
	}
	return whichCD;
}