var displayWaitMessage = true; // Display a please wait message while images
								// are loading?

var activeImage = false;
var imageGalleryLeftPos = false;
var imageGalleryWidth = false;
var imageGalleryObj = false;
var maxGalleryXPos = false;
var slideSpeed = -1;
var imageGalleryCaptions = new Array();
function startSlide(e) {
	if (document.all)
		e = event;
	var id = this.id;
	if (this.id == 'arrowRight') {
		slideSpeedMultiply = Math.floor((e.clientX - this.offsetLeft) / 5);
		slideSpeed = -1 * slideSpeedMultiply;
		slideSpeed = Math.max(-10, slideSpeed);
	} else {
		slideSpeedMultiply = 10 - Math.floor((e.clientX - this.offsetLeft) / 5);
		slideSpeed = 1 * slideSpeedMultiply;
		slideSpeed = Math.min(10, slideSpeed);
		if (slideSpeed < 0)
			slideSpeed = 10;
	}
}

function releaseSlide() {
	var id = this.id;
	slideSpeed = -1;
}

function gallerySlide() {
	if (slideSpeed != 0) {
		var leftPos = imageGalleryObj.offsetLeft;
		leftPos = leftPos / 1 + slideSpeed;
		if (leftPos > maxGalleryXPos) {
			leftPos = maxGalleryXPos;
			slideSpeed = 0;

		}
		if (leftPos < minGalleryXPos) {
			leftPos = minGalleryXPos;
			slideSpeed = 0;
		}

		imageGalleryObj.style.left = leftPos + 'px';
	}
	setTimeout('gallerySlide()', 50);

}

function showImage() {
	if (activeImage) {
		activeImage.style.filter = 'alpha(opacity=50)';
		activeImage.style.opacity = 0.5;
	}
	this.style.filter = 'alpha(opacity=100)';
	this.style.opacity = 1;
	activeImage = this;
	slideSpeed=0;
}

function leaveImage() {
	if (activeImage) {
		activeImage.style.filter = 'alpha(opacity=50)';
		activeImage.style.opacity = 0.5;
	}
	
	slideSpeed = -1;
}

function initSlideShow() {
	document.getElementById('arrowLeft').onmousemove = startSlide;
	document.getElementById('arrowLeft').onmouseout = releaseSlide;
	document.getElementById('arrowRight').onmousemove = startSlide;
	document.getElementById('arrowRight').onmouseout = releaseSlide;

	imageGalleryObj = document.getElementById('theLogos');
	imageGalleryLeftPos = imageGalleryObj.offsetLeft;
	imageGalleryWidth = document.getElementById('LogoGallery').offsetWidth - 80;
	maxGalleryXPos = imageGalleryObj.offsetLeft;
	minGalleryXPos = imageGalleryWidth
			- document.getElementById('slideEnd').offsetLeft;
	var slideshowImages = imageGalleryObj.getElementsByTagName('IMG');
	for ( var no = 0; no < slideshowImages.length; no++) {
		slideshowImages[no].onmouseover = showImage;
		slideshowImages[no].onmouseout = leaveImage;
	}

	var divs = imageGalleryObj.getElementsByTagName('DIV');
	for ( var no = 0; no < divs.length; no++) {
		if (divs[no].className == 'imageCaption')
			imageGalleryCaptions[imageGalleryCaptions.length] = divs[no].innerHTML;
	}
	gallerySlide();
}

function showPreview(imagePath, imageIndex) {
	var subImages = document.getElementById('previewPane')
			.getElementsByTagName('IMG');
	if (subImages.length == 0) {
		var img = document.createElement('IMG');
		document.getElementById('previewPane').appendChild(img);
	} else
		img = subImages[0];

	if (displayWaitMessage) {
		document.getElementById('waitMessage').style.display = 'inline';
	}
	document.getElementById('largeImageCaption').style.display = 'none';
	img.onload = function() {
		hideWaitMessageAndShowCaption(imageIndex - 1);
	};
	img.src = imagePath;

}
function hideWaitMessageAndShowCaption(imageIndex) {
	document.getElementById('waitMessage').style.display = 'none';
	document.getElementById('largeImageCaption').innerHTML = imageGalleryCaptions[imageIndex];
	document.getElementById('largeImageCaption').style.display = 'block';

}
window.onload = initSlideShow;