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

	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 w=1;
	
	function startSlide(e)
	{
		if(document.all)e = event;
		var id = this.id;
		this.getElementsByTagName('IMG')[0].src = '/images/2009/' + this.id + '_over.gif';
		if(this.id=='arrow_right'){
			slideSpeedMultiply = Math.floor((e.clientX - this.offsetLeft) / 1);
			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/2009/' + this.id + '.gif';
		slideSpeed=0;
	}

	function gallerySlide()
	{   
	    
		if(slideSpeed!=0){
			var leftPos = imageGalleryObj.offsetLeft;
			leftPos = leftPos/1 + slideSpeed;
			var s;
			switch(w){
			 case 1: 
				if(slideSpeed<0){
				s=736;
				l=2208;
		
				}else{
				s=741;
				l=2208;
				}
			    break
			 case 2: 
			    if(slideSpeed<0){
			    s=736;
				l=2208;
				
				}else{
				s=741;
				l=1477;
				}
			    break
			 case 3: 
			    if(slideSpeed<0){
			    s=553;
				l=1651;
				}else{
				s=737;
				l=2945;
				}
			    break
			 case 4: 
			    if(slideSpeed>0){
			    s=736;
				l=4416;
				}
			    break
			}
			if(imageGalleryObj.offsetLeft==3 && slideSpeed>=0){
			   leftPos = 3;
			   slideSpeed = 0;
			   w=1;
			}
			if(imageGalleryObj.offsetLeft==5 && slideSpeed>=0){
			   leftPos = 5;
			   slideSpeed = 0;
			   w=1;
			}
			if(imageGalleryObj.offsetLeft== -1659 && slideSpeed<=0){
			   leftPos = -1659;
			   slideSpeed=0;
			   w=4;
			}

			     if(leftPos<= -s*w && slideSpeed<0)
				 {
					  if(imageGalleryObj.offsetLeft== -1659){
					   leftPos = -1659;
					   slideSpeed=0;
					   w=4;
			       }else{
				   leftPos =-s*w;
				   slideSpeed=0;
				   w=w+1;
				   
				   }
				 }
				 
				if( slideSpeed>0 && leftPos >= s*w-l)
				 {
					if(imageGalleryObj.offsetLeft== 0){
					   leftPos = 0;
					   slideSpeed=0;
					   w=1;
			       }else if(leftPos >= s*w-l){
					   leftPos = s*w-l;
					   slideSpeed=0;
					   w=w-1;
				    /*if(w==4){
					   w=1;
					}*/
				   }
				 }
			imageGalleryObj.style.left = leftPos + 'px';
		}
		
		/*d.innerText = "leftPos =" + leftPos + " slideSpeed="+slideSpeed+" maxGalleryXPos="+maxGalleryXPos+" minGalleryXPos="+minGalleryXPos+" imageGalleryObj.offsetLeft="+imageGalleryObj.offsetLeft+" imageGallerywidth="+imageGallerywidth+" slideEnd="+document.getElementById('slideEnd').offsetLeft+" galleryContainer="+document.getElementById('galleryContainer').offsetwidth+" w="+w+"";*/
		setTimeout('gallerySlide()',1);

	}
	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()
	{
		/*document.getElementById('arrow_left').onmousemove = startSlide;*/
		/*document.getElementById('arrow_left').onmousemove = startSlide;*/
		document.getElementById('arrow_left').onclick = startSlide;
		/*document.getElementById('arrow_left').onmouseout = releaseSlide;*/
		/*document.getElementById('arrow_right').onmousemove = startSlide;*/
		document.getElementById('arrow_right').onclick = 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;