// Browser & Platform Variables
var platform = navigator.platform.substr(0,3);
var browser = navigator.appName;
var shortVersion = navigator.appVersion.substr(0,1);
var longVersion = navigator.appVersion;

// Variables needed for Rollovers
var finished = 'no';
var over = 'no';
var whichOne = ' ';
var styleSheetElement;
var oldElement;


if (document.images) {
aboutOn = new Image();
aboutOn.src = "/images/site/nav/about-over.gif";
aboutOff = new Image();
aboutOff.src = "/images/site/nav/about.gif";

newsOn = new Image();
newsOn.src = "/images/site/nav/news-over.gif";
newsOff = new Image();
newsOff.src = "/images/site/nav/news.gif";

progeventsOn = new Image();
progeventsOn.src = "/images/site/nav/progevents-over.gif";
progeventsOff = new Image();
progeventsOff.src = "/images/site/nav/progevents-down.gif";

makeyourmovieOn = new Image();
makeyourmovieOn.src = "/images/site/nav/makeyourmovie-over.gif";
makeyourmovieOff = new Image();
makeyourmovieOff.src = "/images/site/nav/makeyourmovie.gif";

networkingOn = new Image();
networkingOn.src = "/images/site/nav/networking-over.gif";
networkingOff = new Image();
networkingOff.src = "/images/site/nav/networking.gif";

membershipOn = new Image();
membershipOn.src = "/images/site/nav/membership-over.gif";
membershipOff = new Image();
membershipOff.src = "/images/site/nav/membership.gif";

sponsorsOn = new Image();
sponsorsOn.src = "/images/site/nav/sponsors-over.gif";
sponsorsOff = new Image();
sponsorsOff.src = "/images/site/nav/sponsors.gif";

storeOn = new Image();
storeOn.src = "/images/site/nav/store-over.gif";
storeOff = new Image();
storeOff.src = "/images/site/nav/store.gif";

}

// function that turns on the main nav graphics as well as the menus
function menuOn(pic) {
	if (finished == 'yes') {
		over = 'yes';
		if ((browser == 'Netscape') && (shortVersion < 5)) {
			if (whichOne != ' ')  {
				eval('document.' + whichOne + 'Menu.visibility = "hidden"');	
				document.images[whichOne].src = eval(whichOne + 'Off.src');			
			}
			eval('document.' + pic + 'Menu.visibility = "visible"');
			document.images[pic].src = eval(pic + 'On.src');
			whichOne = pic;			
		} else {
			if(document.images) {
				if (whichOne != ' ') {
					eval('document.images[whichOne].src = ' + whichOne + 'Off.src');
					whichOne = whichOne + 'Menu';
					oldElement = document.getElementById(whichOne);
					oldElement.style.visibility = "hidden";
				}
				layerName = pic + 'Menu';
				styleSheetElement = document.getElementById(layerName);		
				styleSheetElement.style.visibility = "visible";
				eval('document.images[pic].src = ' + pic + 'On.src');
				whichOne = layerName;		
			}
		}
	}
}


// Timer function that is run to give the user time to get to the menu from the button
function overChecker(pic) {
	if ((over == 'yes') && (finished == 'yes')) {
		whichOne = pic;
		over = 'no';
		setTimeout("menuOff()", 100);
	}
}

// function that turns off the main nav graphics as well as the menus
function menuOff() {
	if (document.images) {
		if (over == 'no')  {	
			if ((browser == 'Netscape') && (shortVersion < 5)) {
				document.images[whichOne].src = eval(whichOne + 'Off.src');	
				eval('document.' + whichOne + 'Menu.visibility = "hidden"');	
			} else {
				styleSheetElement.style.visibility = "hidden";
				eval('document.images[whichOne].src = ' + whichOne + 'Off.src');
			}
		}	
	}
}