/************************************************************************************************************
	(C) www.dhtmlgoodies.com, November 2005
	
	This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.	
	
	Terms of use:
	You are free to use this script as long as the copyright message is kept intact. However, you may not
	redistribute, sell or repost it without our permission.
	
	Thank you!
	
	www.dhtmlgoodies.com
	Alf Magne Kalleland
	
	************************************************************************************************************/
	var arrowImageWidth = 35;	// Height of arrow image in pixels;
	
	var previewImage = false;
	var previewImageParent = false;
	var slideSpeed = 0;
	var previewImagePane = false;
	var slideEndMarker = false;
	var hscroller = false;
	var imageGalleryCaptions = new Array();
	
	var isOverScroller=false;
	
	function getTopPos(inputObj)
	{		
	
	  var returnValue = inputObj.offsetTop;
	  while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetTop;
	  return returnValue;
	}
	
	function getLeftPos(inputObj)
	{

	  var returnValue = inputObj.offsetLeft;
	  while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetLeft;
	  return returnValue;
	}

	function initSlide(e)
	{
		if(document.all)e = event;
		
		if (isOverScroller){
			if(this.src.indexOf('over')<0) this.src = this.src.replace('.gif','-over.gif');			
			slideSpeed = e.clientX + Math.max(document.body.scrollLeft,document.documentElement.scrollLeft) - getLeftPos(this);
			if(this.src.indexOf('right')>=0){
				slideSpeed = (slideSpeed)*-1;	
			}else{
				slideSpeed = arrowImageWidth - slideSpeed;
			}
			slideSpeed = Math.round(slideSpeed * 10 / (arrowImageWidth/2));
		}else{
			slideSpeed = (slideSpeed)*-1;
		}		
	}
	
	function stopSlide()
	{		
		slideSpeed = 0;
		this.src = this.src.replace('-over','');
	}
	
	function slidePreviewPane()
	{
		if(slideSpeed!=0){
			var leftPos = previewImagePane.style.left.replace(/[^\-0-9]/g,'')/1;	
		
			if(slideSpeed<0 && slideEndMarker.offsetLeft<(previewImageParent.offsetWidth - leftPos)){
				slideSpeed=0;			
			}
			leftPos = leftPos + slideSpeed;
			if(leftPos>0)leftPos=0;

		 	previewImagePane.style.left = leftPos + 'px';
	 	
		}
		
						//	window.status = slideSpeed + ' - ' + leftPos + ' - ' + slideEndMarker.offsetLeft;
		
	 	setTimeout('slidePreviewPane()',30);		
	}
	
	
	function initGalleryScript()
	{
		previewImageParent = document.getElementById('elems');
		previewImagePane = document.getElementById('elems').getElementsByTagName('DIV')[0];
		previewImagePane.style.left = '0px';
		hscroller  = document.getElementById('hscroller');
		slideEndMarker = document.getElementById('slideEnd');
		
		document.getElementById('arrow_left_image').onmousemove = initSlide;
		document.getElementById('arrow_left_image').onmouseout = stopSlide;
		
		document.getElementById('arrow_right_image').onmousemove = initSlide;
		document.getElementById('arrow_right_image').onmouseout = stopSlide;
		
		document.getElementById('hscroller').onmouseout = function(){slideSpeed=1; isOverScroller=false; initSlide();};
		document.getElementById('hscroller').onmouseover = function(){slideSpeed=0; isOverScroller=true; };
		
		slideSpeed=1; 
		initSlide();
		
		slidePreviewPane();
		
	}