/***********************************************************************************************
	
	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 the_image=false;
	
	//	 chris
	var image_width=85;
	var num_images	=10;
	var gallery_steps=-((image_width*num_images)+20);
	var counter=1;
		
	function startSlide(e){
		if(document.all)e = event;
		var id = this.id;
		this.getElementsByTagName('IMG')[0].src = '/~d256348/images/' + this.id + '_over.png';	
		if(this.id=='arrow_right'){
			//alert(gallery_steps);
			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) / 1);
			slideSpeed = 1*slideSpeedMultiply;
			slideSpeed = Math.min(10,slideSpeed);
			if(slideSpeed<0)slideSpeed=10;
		}
	}
	//CHRIS
	// slide to exact position
	function slide_to_pos(the_image){
	
		//	get image position
		imageObj = document.getElementById(the_image);
		imageLeftPos = imageObj.offsetLeft;
		//alert(imageLeftPos);
		new_pos_min = -(imageLeftPos-12);
		var leftPos = imageGalleryObj.offsetLeft;
		leftPos = leftPos/1 + slideSpeed;
		if(leftPos<imageLeftPos){
			leftPos = new_pos_min;
			slideSpeed=0;
			
		}else{
			slideSpeed=-10;
		}
		imageGalleryObj.style.left = leftPos + 'px';
		
		//setTimeout('slide_to_pos(the_image)',20);
		
	}
	
	
	
	
	function releaseSlide()
	{
		var id = this.id;
		this.getElementsByTagName('IMG')[0].src = '/~d256348/images/' + this.id + '.png';
		slideSpeed=0;
	}
		
	function gallerySlide()
	{
		if(slideSpeed!=0){
			var leftPos = imageGalleryObj.offsetLeft;
			leftPos = leftPos/1 + slideSpeed;
			if(leftPos>maxGalleryXPos){
				leftPos = maxGalleryXPos;
				slideSpeed = 0;
				counter=counter-1;
			}
			
			//	 define next posistion
			slide_right_min=gallery_steps*counter;
			
			//	slide till end of next group
			if(leftPos<slide_right_min){
				counter=counter+1;
				leftPos = slide_right_min;
				slideSpeed=0;
				document.getElementById('arrow_right').src = '/~d256348/images/arrow_right.png';
			}
			
			//	always keep maximum
			if(leftPos<minGalleryXPos){
				leftPos = minGalleryXPos;
				slideSpeed=0;
				//document.getElementById('arrow_right').display="hidden";
			}
			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()
	{
		//alert('AVISO - actualmente se esta trabajando sobre el scroll horizontal para mejorar su funcionamiento. (24/09/2007)');
		document.getElementById('arrow_left').onmouseover = startSlide;
		//document.getElementById('arrow_left').onmouseout = releaseSlide;
		document.getElementById('arrow_right').onmouseover = startSlide;
		//document.getElementById('arrow_right').onmouseout = releaseSlide;
		
		imageGalleryObj = document.getElementById('subcat_products');
		imageGalleryLeftPos = imageGalleryObj.offsetLeft;
		imageGalleryWidth = document.getElementById('contentWrapper').offsetWidth - 10;
		maxGalleryXPos = imageGalleryObj.offsetLeft; 
		
		minGalleryXPos = imageGalleryWidth - document.getElementById('slideEnd').offsetLeft;
		
		
		//alert(jumps_width);
		//gallery_steps	= minGalleryXPos/jumps_width;
		
		//alert(gallery_steps);
		//alert(minGalleryXPos);
		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();
	}