var picGroup = 1;

var maxGroup = 5;



function thumb(i) {

	return i.substring(0, (i.length-4)) + '_tn.jpg';

}



function moveLeft() {

	if (picGroup - 1 >= 1) {

		document.getElementById('pics'+picGroup).style.display = 'none';

		document.getElementById('pics'+(picGroup-1)).style.display = 'block';

		picGroup--;

	}

}



function moveRight() {

	if (picGroup < maxGroup) {

		document.getElementById('pics'+picGroup).style.display = 'none';

		document.getElementById('pics'+(picGroup+1)).style.display = 'block';

		picGroup++;

	}

}