var imagesNumber = 4; //Should be considered a constant
var fadingInterval = 2500 //Should be considered a constant
var cycleDuration = 12000; //Should be considered a constant
var imagesIdentifier = "movieImage"; //Should be considered a constant
var image1Identifier = "movieImage1"; //Should be considered a constant
var image2Identifier = "movieImage2"; //Should be considered a constant
var imageExtension = ".jpg"; //Should be considered a constant
var imagesFolder = "Images/"; //Should be considered a constant
var currentImage = 0;
var interval="";
var selectedBlueMenuCell=""; //Used to determine which amongst the existent BlueMenuItems is selected
var selectedBlueMenuLink=""; //Used to determine which amongst the existent BlueMenuItems is selected

function moveNext()
{
	stopInterval();
	if (currentImage == imagesNumber)
		nextImage = 1;
	else
		nextImage = currentImage + 1;
	Animate(1);
	startInterval();
}

function movePrev()
{
	stopInterval();
	if (currentImage == 0)
		nextImage = imagesNumber;
	else
		nextImage = currentImage - 1;
	Animate(-1);
	startInterval();
}
function stopMovie()
{
	stopInterval();
}


function startInterval()
{
	interval = window.setInterval("Animate(1)",cycleDuration);
}
function setInitialOpacity()
{
	for(i=1;i<=imagesNumber;i++)
		if(i!=1)
			changeOpac(0,imagesIdentifier + i);
}
function stopInterval()
{
    window.clearInterval(interval);
    interval="";
}

function Animate(jump)
{
	if (currentImage == 0)
			currentImage = 1;
			
	nextImage = currentImage + jump;
	
	if (nextImage == 0)
		nextImage = imagesNumber;
	if (nextImage > imagesNumber)
		nextImage = 1;
	
	if(document.getElementById(imagesIdentifier + currentImage))
	{
		var objectImage1 = document.getElementById(imagesIdentifier + currentImage);
		var objectImage2 = document.getElementById(imagesIdentifier + nextImage);
		
		//Apply Style to the next image
		objectImage2.className = "Location";
			
		//Fade Out Current Image
		opacity(objectImage1.id,100,0,fadingInterval);
		//Fade In new Image
		opacity(objectImage2.id,0,100,fadingInterval);
	}
	currentImage = nextImage;
}

function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

function preloadImages() { 
  var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

// JScript source code
function ApplyStyle(what, styleName)
{
	if(what.className)
		what.className = styleName;
}

function changeIframeSrc(newURL,selectedCell, iFrameHeight)
{
	if(window.document.all.contentIFrame.src != newURL)
	{
		window.document.all.contentIFrame.src = newURL;
		if(iFrameHeight!="" && !(isNaN(iFrameHeight)))
			window.document.all.contentIFrame.height = iFrameHeight;
		ApplyStyle(selectedCell,"BlueMenuClicked");
	
		restorePrevMenu();
	
		selectedBlueMenuCell = selectedCell.id;
	}
}

function restorePrevMenu()
{
	if(window.document.all[selectedBlueMenuCell])
		ApplyStyle(window.document.all[selectedBlueMenuCell],"BlueMenu");
}

function DoMouseOver(cell)
{
	if(cell.className != "BlueMenuClicked")
		ApplyStyle(cell,"BlueMenuSelected");
}

function DoMouseOut(cell)
{
	if(cell.className != "BlueMenuClicked")
		ApplyStyle(cell,"BlueMenu");

}


function setBlueMenuItemSelected(cell)
{
	ApplyStyle(cell,"BlueMenuSelected");
}