function initNext(imagesList, position, combosList) {
	if (position + 1 <= imagesList.length-1)  {
		document.getElementById('next').style.cursor='pointer';
		document.getElementById('next').src=next;
	} else {
		document.getElementById('next').style.display='none';
		document.getElementById('previous').style.display='none';		
	}
	
	if (combosList[imagesList[position]][0] != '') {
		document.getElementById('caption').style.display='';
		document.getElementById('caption').innerHTML=combosList[imagesList[position]][0];
	} else
		document.getElementById('caption').style.display='none';
	
	if (combosList[imagesList[position]][1] != '') {
		document.getElementById('photographer').style.display='';
		document.getElementById('photographer').innerHTML=combosList[imagesList[position]][1];
	} else
		document.getElementById('photographer').style.display='none';
}

function setNextPicture(image, caption, photographer, action, imagesList, position, combosList) {
	var increment;
	if (action == 'prev')
		increment = -1;
	else
		increment = 1;
		
	if (position+increment >= 0 && position+increment <= imagesList.length-1) {
		if (position + 2*increment > imagesList.length-1)  {
			document.getElementById('next').style.cursor='default';
			document.getElementById('next').src=nextG;
		} else {
			document.getElementById('next').style.display='';
			document.getElementById('next').style.cursor='pointer';						
			document.getElementById('next').src=next;
		}
		
		if (position + 2*increment < 0) {
			document.getElementById('previous').style.cursor='default';
			document.getElementById('previous').src=previousG;
		} else {
			document.getElementById('previous').style.display='';						
			document.getElementById('previous').style.cursor='pointer';						
			document.getElementById('previous').src=previous;
		}
			
		document.getElementById('image').src='http://www.horsesport.org/picts/full/'+imagesList[position+increment]+'.jpg';
		
		if (combosList[imagesList[position+increment]][0] != '') {
			document.getElementById('caption').style.display='';
			document.getElementById('caption').innerHTML=combosList[imagesList[position+increment]][0];
		} else
			document.getElementById('caption').style.display='none';
		
		if (combosList[imagesList[position+increment]][1] != '') {
			document.getElementById('photographer').style.display='';
			document.getElementById('photographer').innerHTML=combosList[imagesList[position+increment]][1];
		} else
			document.getElementById('photographer').style.display='none';

		return position+increment;
	
	} else
		return position;
}