bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
if (bName == "Microsoft Internet Explorer" && bVer >=4) br = "e4";
else br = "n2";

//IE4 STYLESHEET
if (br == "e4") {
	document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://www.jetblue.com/css/jetblueie.css" TYPE="text/css" MEDIA="Screen">');
	}
else { 
	document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://hola.jetblue.com/enes/css/jetbluens.css" TYPE="text/css" MEDIA="Screen">');
	}



if (navigator.appVersion.indexOf("Mac")>-1) {
		document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://www.jetblue.com/css/jetbluemac.css" TYPE="text/css" MEDIA="Screen">');
} 
	
if (navigator.appVersion.indexOf("Win")>-1) {
	if (navigator.appVersion.indexOf("MSIE")>-1) {
		document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://www.jetblue.com/css/jetblueie.css" TYPE="text/css" MEDIA="Screen">');
	} else if (document.layers) {
		document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://hola.jetblue.com/enes/css/jetbluens.css" TYPE="text/css" MEDIA="Screen">');
	}
} else {
	document.write('<LINK REL="Stylesheet" REV="Stylesheet" HREF="http://www.jetblue.com/css/jetblue.css" TYPE="text/css" MEDIA="Screen">');
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		jetblue_top_nav1_over = newImage("http://www.jetblue.com/images/jetblue_top_nav1-over.gif");
		jetblue_top_nav2_over = newImage("http://www.jetblue.com/images/jetblue_top_nav2-over.gif");
		jetblue_top_nav3_over = newImage("http://www.jetblue.com/images/jetblue_top_nav3-over.gif");
		jetblue_top_nav4_over = newImage("http://www.jetblue.com/images/jetblue_top_nav4-over.gif");
		jetblue_top_nav5_over = newImage("http://www.jetblue.com/images/jetblue_top_nav5-over.gif");
		jetblue_top_nav6_over = newImage("http://www.jetblue.com/images/jetblue_top_nav6-over.gif");
		jetblue_top_nav7_over = newImage("http://www.jetblue.com/images/jetblue_top_nav7-over.gif");
		preloadFlag = true;
	}
}