function image_prev()
{
	if (document.getElementById('image').value == 1)
	{
		document.getElementById('image').value = parseInt(image_url.length) - 1;
		
		if (parseInt(image_url.length) > 5)
		{
			document.getElementById('page_1').style.display='none';
			document.getElementById('page_' + Math.ceil((image_url.length - 1) / 4)).style.display='block';
			
			document.getElementById('pager_1').style.color='#444';
			document.getElementById('pager_' + Math.ceil((image_url.length - 1) / 4)).style.color='#C00';
		}
		document.getElementById('image_zoom').src=loading;
		document.getElementById('image_zoom').src=image_url[document.getElementById('image').value][0];
		document.getElementById('image_zoom_link').href=image_url[document.getElementById('image').value][1];
		hiLightSmall(document.getElementById('image').value);
	}
	else
	{
		
		if (parseInt(document.getElementById('image').value) % 4 == 1 && parseInt(image_url.length) > 5)
		{
			var prev = parseInt(Math.ceil(parseInt(document.getElementById('image').value) / 4) - 1);
			var next = parseInt(Math.ceil(parseInt(document.getElementById('image').value) / 4));
			
			document.getElementById('page_'+next).style.display='none';
			document.getElementById('page_'+prev).style.display='block';
			
			document.getElementById('pager_'+next).style.color='#444';
			document.getElementById('pager_'+prev).style.color='#C00';
		}
		
		document.getElementById('image').value = parseInt(document.getElementById('image').value) - 1;
		document.getElementById('image_zoom').src=loading;
		document.getElementById('image_zoom').src=image_url[document.getElementById('image').value][0];
		document.getElementById('image_zoom_link').href=image_url[document.getElementById('image').value][1];
		hiLightSmall(document.getElementById('image').value);
	}
}

function image_next()
{
	
	if (document.getElementById('image').value < (parseInt(image_url.length) - 1))
	{
		
		if (parseInt(document.getElementById('image').value) % 4 == 0)
		{
			var prev = parseInt(Math.ceil(parseInt(document.getElementById('image').value) / 4));
			var next = parseInt(Math.ceil(parseInt(document.getElementById('image').value) / 4) + 1);
			
			document.getElementById('page_'+next).style.display='block';
			document.getElementById('page_'+prev).style.display='none';
			
			document.getElementById('pager_'+next).style.color='#C00';
			document.getElementById('pager_'+prev).style.color='#444';
		}
		
		document.getElementById('image').value = parseInt(document.getElementById('image').value) + 1;
		document.getElementById('image_zoom').src=loading;
		document.getElementById('image_zoom').src=image_url[document.getElementById('image').value][0];
		document.getElementById('image_zoom_link').href=image_url[document.getElementById('image').value][1];
		hiLightSmall(document.getElementById('image').value);
	}
	else
	{
		document.getElementById('image').value = 1;
		if (parseInt(image_url.length) > 5)
		{
			document.getElementById('page_1').style.display='block';
			document.getElementById('page_' + Math.ceil((image_url.length - 1) / 4)).style.display='none';
			
			document.getElementById('pager_1').style.color='#C00';
			document.getElementById('pager_' + Math.ceil((image_url.length - 1) / 4)).style.color='#444';
		}
		document.getElementById('image_zoom').src=loading;
		document.getElementById('image_zoom').src=image_url[document.getElementById('image').value][0];
		document.getElementById('image_zoom_link').href=image_url[document.getElementById('image').value][1];
		hiLightSmall(document.getElementById('image').value);
	}
}