/***********************************************************************************************
	
	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 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;
		
		if(this.id=='btn_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;
		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 initSlideShow()
	{
		if (document.getElementById('btn_arrow_left'))
		{
			document.getElementById('btn_arrow_left').onmousemove = startSlide;
			document.getElementById('btn_arrow_left').onmouseout = releaseSlide;
			document.getElementById('btn_arrow_right').onmousemove = startSlide;
			document.getElementById('btn_arrow_right').onmouseout = releaseSlide;
		}
		
		imageGalleryObj 		= document.getElementById('theImages');
		imageGalleryLeftPos 	= imageGalleryObj.offsetLeft;
		imageGalleryWidth 		= document.getElementById('galleryContainer').offsetWidth - 30;
		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');
		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';
		}
		//img.onload = function() { hideWaitMessageAndShowCaption(imageIndex-1); };
		img.src = imagePath;
		
	}
	function hideWaitMessageAndShowCaption(imageIndex) {
		document.getElementById('waitMessage').style.display='none';
	}