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

        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();
        function startSlide(e)
        {
                if(document.all)e = event;
                var id = this.id;
                this.getElementsByTagName('IMG')[0].src = '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 = '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(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')) document.getElementById('arrow_left').onmousemove = startSlide;
                if (document.getElementById('arrow_left')) document.getElementById('arrow_left').onmouseout = releaseSlide;
                if (document.getElementById('arrow_right')) document.getElementById('arrow_right').onmousemove = startSlide;
                if (document.getElementById('arrow_right')) 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,href2,title2){
                var subImages = document.getElementById('previewPane').getElementsByTagName('IMG');
                var subA = document.getElementById('previewPane').getElementsByTagName('A');
                var subDiv = document.getElementById('previewPane').getElementsByTagName('DIV');
                 if(subImages.length>0){
                imgZoomMagic = subImages[2];
                imgZoomMagic.src=href2;

                divZoomMagic = subDiv[1];
                //alert(divZoomMagic.innerHTML);
                divZoomMagic.innerHTML=title2;
                          }
                if(subImages.length==0){
                        var img = document.createElement('IMG');
                        document.getElementById('previewPane').appendChild(img);
                }else img = subImages[1];

                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;