//Find out if it is okay to run this script
var runScript = false;
var browserName = navigator.appName;
var browserVersion = parseInt(navigator.appVersion);
if ((browserName == "Netscape" && browserVersion >=3) || (browserName == "Microsoft Internet Explorer" && browserVersion >= 4)) {
	runScript = true;
}
else {
	runScript = false;
}

// the rollover stuff
var Total_Reps = 20;		// number of loops to wait if images have not loaded on the onLoad event
var reps_run = 0;			// counter for Total_Reps
var Total_Images = 16;		// Number of rollover images need to be cached
var images_cached = 0;		// Counter for number of rollover images cached (for Net 3.x and IE 4.x)
var cool_to_run = false;

if (runScript) {
	// initialize our new navigation image objects
	var navOnNav01=new Image();
	var navOnNav02=new Image();
	var navOnNav03=new Image();
	var navOnNav04=new Image();
	var navOnNav05=new Image();
	var navOnNav06=new Image();
	var navOnNav07=new Image();
	var navOnNav08=new Image();
	var navOffNav01=new Image();
	var navOffNav02=new Image();
	var navOffNav03=new Image();
	var navOffNav04=new Image();
	var navOffNav05=new Image();
	var navOffNav06=new Image();
	var navOffNav07=new Image();
	var navOffNav08=new Image();

	// Pre-load ON ons and assign them to variables.
	images_cached++;
	navOnNav01.src="navimages/button1on.gif";
	images_cached++;
	navOnNav02.src="navimages/button2on.gif";
	images_cached++;
	navOnNav03.src="navimages/button3on.gif";
	images_cached++;
	navOnNav04.src="navimages/button4on.gif";
	images_cached++;
	navOnNav05.src="navimages/button5on.gif";
	images_cached++;
	navOnNav06.src="navimages/button6on.gif";
	images_cached++;
	navOnNav07.src="navimages/button7on.gif";
	images_cached++;
	navOnNav08.src="navimages/button8on.gif";

	// Pre-load OFF ons and assign them to variables.
	images_cached++;
	navOffNav01.src="navimages/button1off.gif";
	images_cached++;
	navOffNav02.src="navimages/button2off.gif";
	images_cached++;
	navOffNav03.src="navimages/button3off.gif";
	images_cached++;
	navOffNav04.src="navimages/button4off.gif";
	images_cached++;
	navOffNav05.src="navimages/button5off.gif";
	images_cached++;
	navOffNav06.src="navimages/button6off.gif";
	images_cached++;
	navOffNav07.src="navimages/button7off.gif";
	images_cached++;
	navOffNav08.src="navimages/button8off.gif";
}

//Change button to ON image
function navOn(butName) {
	if (runScript && cool_to_run) {
		document.images[butName].src=eval("navOn" + butName + ".src");
	}
}

//Change button to OFF image
function navOff(butName) {
	if (runScript && cool_to_run) {
		document.images[butName].src=eval("navOff" + butName + ".src");
	}
}

function do_cool() {
	if ((document.images) && (images_cached == Total_Images)) {
		cool_to_run = true;
	}
	else {
		reps_run++;
		if (reps_run < Total_Reps) {
			timevar = setTimeout("do_cool()", 50);
		}
	}
}