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

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=false;	// Display a please wait message while images are loading?
var galinit = false;
var stopInt;
var initInt;
var activeImage = false;
var imageGalleryLeftPos = false;
var imageGalleryWidth = false;
var imageGalleryObj = false;
var maxGalleryXPos = false;
var slideSpeed = 0;
var imageGalleryCaptions = new Array();
var changeInt;
function startSlide(e)
	{
	if(document.all)e = event;
	var id = this.id;
	this.getElementsByTagName('IMG')[0].src = 'http://www.yesbookit.com/images/' + this.id + '_over.gif';	
	if(this.id=='arrow_right')
		{
		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;
	this.getElementsByTagName('IMG')[0].src = 'http://www.yesbookit.com/images/' + this.id + '.gif';
	slideSpeed=0;
	}
	
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()',20);		
	}

function showImage()
	{
	if(stopInt)
		{
		clearTimeout(stopInt);
		}
	if(activeImage)
		{
		activeImage.style.top = 0;
		//activeImage.style.filter = 'alpha(opacity=80)';	
		//activeImage.style.opacity = 0.8;
		}	
	this.style.top = -5;
	//this.style.border = '1px solid #c9f29d';
	//this.style.filter = 'alpha(opacity=100)';
	//this.style.opacity = 1;	
	activeImage = this;	
	}

function outImage()
	{
	this.style.top=0;
	if(isSlide==false)
		{
		stopInt = setTimeout(function(){startSlideshow();isSlide=true;},5000);
		}
	}

function initSlideShow(imgRoot,max1,max2,col)
	{
	if(galinit==true)
		{
		return;
		}
	if(document.getElementById('slidetab'))
		{
		document.getElementById('slidetab').onmouseup = function(){return;};
		}
	document.getElementById('arrow_left').onmousemove = startSlide;
	document.getElementById('arrow_left').onmouseout = releaseSlide;
	document.getElementById('arrow_right').onmousemove = startSlide;
	document.getElementById('arrow_right').onmouseout = releaseSlide;
	imgPath = imgRoot+"_";
	collection = col;
	lastImg1 = max1;
	lastImg2 = max2;
	currentImg = 0;
	imageGalleryObj = document.getElementById('theImages');
	imageGalleryLeftPos = imageGalleryObj.offsetLeft;
	imageGalleryWidth = document.getElementById('galleryContainer').offsetWidth-56;
	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 = outImage;
		}
	var divs = imageGalleryObj.getElementsByTagName('DIV');
	galinit = true;
	gallerySlide();
	isSlide = true;
	initInt = setTimeout('startSlideshow()',4000);
	}

function showPreview(imgid,col)
	{
	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 = imgPath+col+imgid+".jpg";
	currentImg = imgid;
	collection = col;
	if(isSlide == true)
		{
		isSlide = false;
		clearTimeout(initInt);
		clearTimeout(changeInt);
		}
	}
	
function startSlideshow()
	{
	if(ipagenav.currentTabIndex == 1)
		{
		if(collection==2)
			{
			if(currentImg < (lastImg1-1))
				{
				currentImg += 1;
				}
			else if(lastImg2>0)
				{
				currentImg = 0;
				collection = 3;
				}
			else
				{
				currentImg = 0;
				}
			}
		else if(collection==3)
			{
			if(currentImg < (lastImg2-1))
				{
				currentImg += 1;
				}
			else
				{
				currentImg = 0;
				collection = 2;
				}
			}
		var imgs = document.getElementById('previewPane').getElementsByTagName('IMG');
		var img = imgs[0];
		//img.src = imgPath+collection+nextimg+".jpg";
		img.src = imgPath+collection+currentImg+".jpg";
		isSlide = true;
		}
		changeInt = setTimeout(function(){startSlideshow()},5000);
	}

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