// 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 over = 'no';
var whichOne = ' ';
var whichNews = '1';
var styleSheetElement;
var oldElement;


// Function to Assign the relative path to images and links
if (whichLevel == 0) {
	var path = '';
} else {
	var path = '../';
}


navHomeOn = new Image();
navHomeOn.src = "images/nav_0_on.gif";
navHomeOff = new Image();
navHomeOff.src = "images/nav_0.gif";

navProjectsOn = new Image();
navProjectsOn.src = "images/nav_1_on.gif";
navProjectsOff = new Image();
navProjectsOff.src = "images/nav_1.gif";

navCapabilitiesOn = new Image();
navCapabilitiesOn.src = "images/nav_2_on.gif";
navCapabilitiesOff = new Image();
navCapabilitiesOff.src = "images/nav_2.gif";

navPublicationsOn = new Image();
navPublicationsOn.src = "images/nav_3_on.gif";
navPublicationsOff = new Image();
navPublicationsOff.src = "images/nav_3.gif";

navContactOn = new Image();
navContactOn.src = "images/nav_4_on.gif";
navContactOff = new Image();
navContactOff.src = "images/nav_4.gif";



// function that turns on the main nav graphics as well as the menus
function menuOn(pic) {
	over = 'yes';
	if ((browser == 'Netscape') && (shortVersion < 5)) {
		on(pic);		
	}
	else {
		
		var layerName = pic + 'Menu';
		styleSheetElement = document.getElementById(layerName);
		if(document.images) {
			if (whichOne != ' ') {
				if (whichLevel == '1') {
					eval('document.images[whichOne].src = sec' + whichOne + 'Off.src');
				} else {
					eval('document.images[whichOne].src = ' + whichOne + 'Off.src');
				}
				whichOne = whichOne + 'Menu';
				oldElement = document.getElementById(whichOne);
				oldElement.style.visibility = "hidden";
				
			}
			styleSheetElement.style.visibility = "visible";
			if (whichLevel == 1)  {
				eval('document.images[pic].src = sec' + pic + 'On.src');
			} else {
				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 ((browser == 'Netscape') && (shortVersion < 5)) {
		off(pic);		
	}
	else {
		whichOne = pic;
		over = 'no';
		setTimeout("menuOff()", 900);
	}
}

// function that turns off the main nav graphics as well as the menus
function menuOff() 
{
	if (document.images) {
		if (over == 'no')  {	
			styleSheetElement.style.visibility = "hidden";
			if (whichLevel == 1) {
				eval('document.images[whichOne].src = sec' + whichOne + 'Off.src');
			} else {
				eval('document.images[whichOne].src = ' + whichOne + 'Off.src');
			}
		}	
	}
}


// Image replace On Function	
function on(pic) {
	document.images[pic].src = eval(pic + 'On.src');
}
        

// Image replace Off Function	
function off(pic) {
	document.images[pic].src = eval(pic + 'Off.src');
}

function getRandomNum() {
	return (Math.floor(Math.random() * (3 - 1)) + 1);
}

// window opener 4 news
function windowOpener1(desktopURL)   
		{
		desktop = window.open(desktopURL,"news","toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,width=730,height=700,resizable=no")
	}
	
// window opener 4 downloads/signup/login
function downloadOpener(desktopURL)   
		{
		desktop = window.open(desktopURL,"downloads","toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,width=730,height=700,resizable=yes")
	}
	
// window opener 4 downloads/signup/login
function privacyOpener(desktopURL)   
		{
		desktop = window.open(desktopURL,"downloads","toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,width=730,height=700,resizable=yes")
	}
	
// window opener 4 news
function messageOpener(desktopURL)   
		{
		desktop = window.open(desktopURL,"downloads","toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,width=640,height=400,resizable=no")
	}