var opacitySpeed = 2;	// Speed of opacity - switching between large images - Lower = faster
	var opacitySteps = 10; 	// Also speed of opacity - Higher = faster
	var slideSpeed = 5;	// Speed of thumbnail slide - Lower = faster
	var slideSteps = 8;	// Also speed of thumbnail slide - Higher = faster
	var columnsOfThumbnails = 4;	// Hardcoded number of thumbnail columns, use false if you want the script to figure it out dynamically.
	
	/* Don't change anything below here */
	var NIR_largeImage = false;
	var NIR_imageToShow = false;
	var NIR_currentOpacity = 100;
	var NIR_slideWidth = false;
	var NIR_thumbTotalWidth = false;
	var NIR_viewableWidth = false;
	
	var currentUnqiueOpacityId = false;
	var NIR_currentActiveImage = false;
	var NIR_thumbDiv = false;
	var NIR_thumbSlideInProgress = false;
	
	var browserIsOpera = navigator.userAgent.indexOf('Opera')>=0?true:false;
	var leftArrowObj;
	var rightArrowObj;
	var thumbsColIndex = 1;
	var thumbsLeftPos = false;
	
	function initGalleryScript()
	{
		leftArrowObj = document.getElementById('NIR_leftArrow');		
		leftArrowObj.style.visibility='hidden';
		rightArrowObj = document.getElementById('NIR_rightArrow');	
		leftArrowObj.style.cursor = 'pointer';	
		rightArrowObj.style.cursor = 'pointer';	
		leftArrowObj.onclick = moveThumbnails;
		rightArrowObj.onclick = moveThumbnails;
		NIR_largeImage = document.getElementById('NIR_largeImage').getElementsByTagName('IMG')[0];
		var innerDiv = document.getElementById('NIR_thumbs_inner');
		NIR_slideWidth = innerDiv.getElementsByTagName('DIV')[0].offsetWidth;
		NIR_thumbDiv = document.getElementById('NIR_thumbs_inner');
		NIR_thumbDiv.style.left = '0px';
		
		var subDivs = NIR_thumbDiv.getElementsByTagName('DIV');
		NIR_thumbTotalWidth = 0;
		var tmpLeft = 0;
		for(var no=0;no<subDivs.length;no++){
			if(subDivs[no].className=='strip_of_thumbnails'){
				NIR_thumbTotalWidth = NIR_thumbTotalWidth + NIR_slideWidth;
				subDivs[no].style.left = tmpLeft + 'px';
				subDivs[no].style.top = '0px';
				tmpLeft = tmpLeft + subDivs[no].offsetWidth;
			}
		}

		NIR_viewableWidth = document.getElementById('NIR_thumbs').offsetWidth;
		
		
		NIR_currentActiveImage = NIR_thumbDiv.getElementsByTagName('A')[0].getElementsByTagName('IMG')[0];
		NIR_currentActiveImage.className='activeImage';
	}
	
	function moveThumbnails()
	{
		if(NIR_thumbSlideInProgress)return;
		NIR_thumbSlideInProgress = true;
		if(this.id=='NIR_leftArrow'){
			thumbsColIndex--;
			rightArrowObj.style.visibility='visible';
			if(NIR_thumbDiv.style.left.replace('px','')/1>=0){
				leftArrowObj.style.visibility='hidden';
				NIR_thumbSlideInProgress = false;
				return;
			}
			
			slideThumbs(slideSteps,0);
			
		}else{
			thumbsColIndex++;
			leftArrowObj.style.visibility='visible';
			var left = NIR_thumbDiv.style.left.replace('px','')/1;	
			var showArrow = true;
			if(NIR_thumbTotalWidth + left - NIR_slideWidth <= NIR_viewableWidth)showArrow = false;
			if(columnsOfThumbnails)showArrow = true;
				
			if(!showArrow)	
			{
				rightArrowObj.style.visibility='hidden';
				NIR_thumbSlideInProgress = false;
				return;
			}	
			
			slideThumbs((slideSteps*-1),0);
		}	
		
	}
	
	function slideThumbs(speed,currentPos)
	{
		var leftPos;
		if(thumbsLeftPos){
			leftPos= thumbsLeftPos;
		}else{
			var leftPos = NIR_thumbDiv.style.left.replace('px','')/1;
			thumbsLeftPos = leftPos;
		}
		currentPos = currentPos + Math.abs(speed);		
		var tmpLeftPos = leftPos;
		leftPos = leftPos + speed;
		thumbsLeftPos = leftPos;
		NIR_thumbDiv.style.left = leftPos + 'px';
		if(currentPos<NIR_slideWidth)setTimeout('slideThumbs(' + speed + ',' + currentPos + ')',slideSpeed);else{
			if(tmpLeftPos>=0 || (columnsOfThumbnails && thumbsColIndex==1)){
				document.getElementById('NIR_leftArrow').style.visibility='hidden';
			}	
			var left = tmpLeftPos;		
			var showArrow = true;
			if(NIR_thumbTotalWidth + left - NIR_slideWidth <= NIR_viewableWidth)showArrow=false;
			if(columnsOfThumbnails){
				if((thumbsColIndex+1)<columnsOfThumbnails)showArrow=true; else showArrow = false;				
			}			
			if(!showArrow){
				document.getElementById('NIR_rightArrow').style.visibility='hidden';
			}					
			NIR_thumbSlideInProgress = false;
		}
	
	}
	
	function showPreview(imagePath,inputObj)
	{		
		if(NIR_currentActiveImage){
			if(NIR_currentActiveImage==inputObj.getElementsByTagName('IMG')[0])return;
			NIR_currentActiveImage.className='';
		}
		NIR_currentActiveImage = inputObj.getElementsByTagName('IMG')[0];
		NIR_currentActiveImage.className='activeImage';
		
		NIR_imageToShow = imagePath;
		var tmpImage = new Image();
		tmpImage.src = imagePath;
		currentUnqiueOpacityId = Math.random();
		moveOpacity(opacitySteps*-1,currentUnqiueOpacityId);
	}
	
	function setOpacity()
	{
		if(document.all)
		{
			NIR_largeImage.style.filter = 'alpha(opacity=' + NIR_currentOpacity + ')';
		}else{
			NIR_largeImage.style.opacity = NIR_currentOpacity/100;
		}		
	}
	function moveOpacity(speed,uniqueId)
	{
		
		if(browserIsOpera){
			NIR_largeImage.src = NIR_imageToShow;
			return;
		}
		
		NIR_currentOpacity = NIR_currentOpacity + speed;
		if(NIR_currentOpacity<=5 && speed<0){
		
			var tmpParent = NIR_largeImage.parentNode; 
			NIR_largeImage.parentNode.removeChild(NIR_largeImage);
			NIR_largeImage = document.createElement('IMG');
			tmpParent.appendChild(NIR_largeImage);
			setOpacity();
			NIR_largeImage.src = NIR_imageToShow;
		
			speed=opacitySteps;
		}
		if(NIR_currentOpacity>=99 && speed>0)NIR_currentOpacity=99;		
		setOpacity();	
		if(NIR_currentOpacity>=99 && speed>0)return;		
		if(uniqueId==currentUnqiueOpacityId)setTimeout('moveOpacity(' + speed + ',' + uniqueId + ')',opacitySpeed);		
	}
document.write('');
document.write('');
document.write('');
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