/***********************************************************************************************
	
	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 activeImageGalleries = false;
	var imageGalleryLeftPosGalleries = false;
	var imageGalleryHeightGalleries = false;
	var imageGalleryObjGalleries = false;
	var maxGalleryYPosGalleries = false;
	var minGalleryYPosGalleries = false;
	var slideSpeedGallery = 0;
	var imageGalleryCaptionsGalleries = new Array();
	
	function startSlideGalleries(e)
	{
		if(document.all)e = event;
		var id = this.id;
		//this.getElementsByTagName('IMG')[0].src = 'images/' + this.id + '_over.gif';	
		if(this.id=='arrow_down'){
			slideSpeedMultiply = Math.floor((e.clientY - this.offsetTop) / 15);
			slideSpeedGallery = -1*slideSpeedMultiply;
			slideSpeedGallery = Math.max(-10,slideSpeedGallery);
		}else{
			slideSpeedMultiply = Math.floor((e.clientY - this.offsetTop) / 15);
			slideSpeedGallery = 1*slideSpeedMultiply;
			slideSpeedGallery = Math.min(10,slideSpeedGallery);
			if(slideSpeedGallery<0)slideSpeedGallery=10;
		}
	}
	
	function releaseSlideGalleries()
	{
		var id = this.id;
		//this.getElementsByTagName('IMG')[0].src = 'images/' + this.id + '.gif';
		slideSpeedGallery=0;
	}
		
	function gallerySlideGalleries()
	{
		if(slideSpeedGallery!=0){
			var TopPos = imageGalleryObjGalleries.offsetTop;
			TopPos = TopPos + slideSpeedGallery;
			
			
			if(TopPos<minGalleryYPosGalleries){
				TopPos = minGalleryYPosGalleries;
				slideSpeedGallery=0;
			}
			
			if(TopPos>maxGalleryYPosGalleries){
				TopPos = maxGalleryYPosGalleries;
				slideSpeedGallery = 0;
				
			}
			
			imageGalleryObjGalleries.style.top = TopPos + 'px';
		}
		setTimeout('gallerySlideGalleries()',20);
		
	}
	
	function showImageGalleries()
	{
		/*if(activeImage){
			activeImage.style.filter = 'alpha(opacity=50)';	
			activeImage.style.opacity = 0.5;
		}	
		this.style.filter = 'alpha(opacity=100)';
		this.style.opacity = 1;	*/
		activeImageGalleries = this;	
	}
	
	function initSlideShowGalleries()
	{
		if(document.getElementById('arrow_down'))
		{ 
			document.getElementById('arrow_down').onclick = startSlideGalleries;
			document.getElementById('arrow_down').onmouseout = releaseSlideGalleries;
		}
		if(document.getElementById('arrow_up'))
		{
			document.getElementById('arrow_up').onclick = startSlideGalleries;
			document.getElementById('arrow_up').onmouseout = releaseSlideGalleries;
		}
		if(document.getElementById('galleriesPhotosBox'))
		{
			imageGalleryObjGalleries = document.getElementById('galleriesPhotosBox');
			imageGalleryHeightGalleries = imageGalleryObjGalleries.offsetTop;
			imageGalleryLeftPosGalleries = document.getElementById('boxedinside').offsetHeight - 15;
			maxGalleryYPosGalleries = imageGalleryHeightGalleries;
			minGalleryYPosGalleries =   imageGalleryLeftPosGalleries - document.getElementById('slideGalleriesEnd').offsetTop - 75;
			var slideshowImagesGalleries = imageGalleryObjGalleries.getElementsByTagName('IMG');
			for(var no=0;no<slideshowImagesGalleries.length;no++){
				slideshowImagesGalleries[no].onmouseover = showImageGalleries;
			}
			
			var divs = imageGalleryObjGalleries.getElementsByTagName('DIV');
			for(var no=0;no<divs.length;no++){
				if(divs[no].className=='imageCaption')
				imageGalleryCaptionsGalleries[imageGalleryCaptionsGalleries.length] = divs[no].innerHTML;
			}
			gallerySlideGalleries();
		}
	}
	
	function showPreview(imagePath,imageIndex, url){
		var subImages = $('previewPane').getElementsByTagName('IMG');
		if(subImages.length==0){
			var img = document.createElement('IMG');
			$('previewPane').appendChild(img);
		}else img = subImages[0];
		
		if(displayWaitMessage){
			$('waitMessage').style.display='inline';
		}
		$('largeImageCaption').style.display='none';
		img.onload = function() { hideWaitMessageAndShowCaption(imageIndex-1); };
		img.src = imagePath;
		
		if(url)
		{
			img.onclick=function(){document.location.href = url};
		}
		
		
	}
	function hideWaitMessageAndShowCaption(imageIndex)
	{
		document.getElementById('waitMessage').style.display='none';	
		document.getElementById('largeImageCaption').innerHTML = imageGalleryCaptionsGalleries[imageIndex];
		document.getElementById('largeImageCaption').style.display='block';
		
	}
	window.onload = initSlideShowGalleries;