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

 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 = -1;
 var imageGalleryCaptions = new Array();
 function startSlide(e)
 {
 if(document.all)e = event;
 var id = this.id;
 this.getElementsByTagName('IMG')[0].src = 'images/' + this.id + '_over.png';
 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 = 'images/' + this.id + '.png';
 slideSpeed=-1;
 }

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

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

 }

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

 function initSlideShow()
 {
 document.getElementById('arrow_left').onmousemove = startSlide;
 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;
 }
 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;