/***********************************************************************************************

Copyright (c) 2005 - Alf Magne Kalleland post@dhtmlgoodies.com

UPDATE LOG:

March, 10th, 2006 : Added support for a message while large image is loading

Get this and other scripts at www.dhtmlgoodies.com

You can use this script freely as long as this copyright message is kept intact.

***********************************************************************************************/

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 = 0;
var imageGalleryCaptions = new Array();
var blnSlideInitialized = 0;
if (!imgSlideshowPath)	imgSlideshowPath = "";

function startSlide(e)
{
	if(document.all)e = event;
	var id = this.id;
	//alert(id);
	this.getElementsByTagName('IMG')[0].src = imgSlideshowPath + this.id + '_over.gif';
	//alert(this.id);
	if(this.id=='arrow_right'){
		slideSpeedMultiply = Math.floor((e.clientX - this.offsetLeft) / 5);
		slideSpeed = -1*slideSpeedMultiply;
		slideSpeed = Math.max(-10,slideSpeed);
		//alert(slideSpeed);
	}else{
		slideSpeedMultiply = 10 - Math.floor((e.clientX - this.offsetLeft) / 5);
		slideSpeed = 1*slideSpeedMultiply;
		slideSpeed = Math.min(10,slideSpeed);
		if(slideSpeed<0)slideSpeed=10;
		//alert(slideSpeed);
	}
}

function releaseSlide()
{
	var id = this.id;
	this.getElementsByTagName('IMG')[0].src = imgSlideshowPath + this.id + '.gif';
	slideSpeed=0;
}

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

		}
		if(leftPos<minGalleryXPos){
			leftPos = minGalleryXPos;
			slideSpeed=0;
		}
		imageGalleryObj.style.left = leftPos + 'px';
	}
	setTimeout('gallerySlide()',20);

}

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;
}

function initSlideShow()
{
	if (document.getElementById('arrow_left'))
	{
		//alert("test");
	}

	document.getElementById('arrow_left').onmousemove = startSlide;
	//alert(document.getElementById('arrow_left').onmousemove);
	document.getElementById('arrow_left').onmouseout = releaseSlide;
	document.getElementById('arrow_right').onmousemove = startSlide;
	document.getElementById('arrow_right').onmouseout = releaseSlide;
	imageGalleryObj = document.getElementById('theImages');
	imageGalleryLeftPos = imageGalleryObj.offsetLeft;
	imageGalleryWidth = document.getElementById('galleryContainer').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;
	}

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

	//alert(blnSlideInitialized);
	if (blnSlideInitialized==0)	gallerySlide();
	blnSlideInitialized = 1;

}

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';

}

function openImageWindow()
{
	var dateNow = new Date();
	var intNow = dateNow.getTime();
	imgObjectSrc = document.getElementById("image_large").src;
	window.open(imgObjectSrc,intNow);
}