/***********************************************************************************************
 
 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 leftPos             =0;
 var imageGalleryCaptions = new Array();
//------------------------------------------------------------------------------
 function startSlide(e){
  if(document.all)e = event;
  var id = this.id;
  this.getElementsByTagName('IMG')[0].src = patharrowimg + 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 = patharrowimg + this.id + '.png';
  slideSpeed=0;
 }
  
//------------------------------------------------------------------------------
function gallerySlide(){
  if(slideSpeed!=0){
    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);
 }
 
//------------------------------------------------------------------------------
// IE : 0 [image disappear] .. 100 [image clear]
// FF : 0 [image disappear] .. 1   [image clear]
function showImage(){
	// bug: iEXPLORER 5.5, 6 NO SOPORTAN png EN TRANSPARENCY
	if (/MSIE (5\.5|6\.)/.test(navigator.userAgent)) {activeImage = this; return;}
	if(activeImage === undefined){
	}else if(activeImage){                                 // if the image are without shadow
   activeImage.style.filter = 'alpha(opacity=50)'; // put shadow
   activeImage.style.opacity = 0.5;                // same command in ff
  }
  
  this.style.filter  = 'alpha(opacity=100)';
  this.style.opacity = 0.99; // Can't use 1 and 0 because of screen flickering in FF
	activeImage        = this;
	return;
 }
//------------------------------------------------------------------------------
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');                     // images array
	slideEndOffset   = document.getElementById('slideEnd').offsetLeft;           // width of all images line
	widthContainer   = document.getElementById('imgthumbcontainer').offsetWidth; // width of container
	maxGalleryXPos   = 0;                                                        // ever is negative, the images shift at left
  minGalleryXPos   = widthContainer-slideEndOffset;
	if (minGalleryXPos>0) minGalleryXPos = 0;                                    // bug fixed cuando hay menos imagenes que ancho container
	
	//--function para quitar el filtro en onmuseover------------------------------
  var slideshowImages  = imageGalleryObj.getElementsByTagName('IMG');
  for(var no=0;no<slideshowImages.length;no++){
   slideshowImages[no].onmouseover = showImage;
  }
  //--function para capturar todas las imagenes contenidas en div imagecaption--
  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();
	return;
 }