// browser detect for stylesheet
function checkOS(){

	// file name for PC IE style sheet: change below	
	winsh = '<link href="style.css" rel="stylesheet" type="text/css">';
	// file name for mac IE style sheet: change below
	macsh_ie = '<link href="styles_IEMac.css" rel="stylesheet" type="text/css">';
	// file name for mac NN style sheet: change below
	macsh_ie9 = '<link href="styles_IEMac9.css" rel="stylesheet" type="text/css">';
	// file name for PC NN style sheet: change below
	winsh_NN = '<link href="style_NN.css" rel="stylesheet" type="text/css">';
	// file name for mac NN style sheet: change below
	macsh = '<link href="tyles_nsMac.css" rel="stylesheet" type="text/css">';
	// file name for Netscape 6
	netscpSix = '<link href="styles_nsSix.css" rel="stylesheet" type="text/css">';


	var detect = navigator.userAgent.toLowerCase();
	var browser,version,thestring;
    var ua = navigator.userAgent.toLowerCase(); 	
	
	if (checkIt('msie')) browser = "IE"
	else if (!checkIt('compatible'))
	{
		browser = "NN";
		this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
		versionMajor = parseInt(this.versionMinor);
	}
	else browser = "Unknown";
	
	function checkIt(string)
	{
		place = detect.indexOf(string) + 1;
		thestring = string;
		return place;
	}

	if (navigator.platform == "Win32"){
		if (browser == "IE") document.write(winsh);
		else {
			if (document.layers) document.write(winsh_NN);
			else if ((browser == "NN") && (versionMajor == "6")) document.write(netscpSix);
			else document.write(winsh);
				}
	} else {
  		//if (ua.indexOf("msie 5.2") =-1)
		// document.write(macsh_ie9);
		// else 
		if (browser == "IE") {
			uaStart = ua.indexOf('.',ua.indexOf("msie"));
			 versionMinor = parseInt(ua.substring( uaStart + 1, uaStart +2 ));
			 if (versionMinor < 2) document.write(macsh_ie9);
			 else document.write(macsh_ie);
		} else {
			if (document.layers) document.write(macsh);
			else if ((browser == "NN") && (versionMajor >= "6")) document.write(netscpSix);
			else document.write(macsh_ie);
		}
	}
}
checkOS();