function goToPrev() {
	if (page > 1) {
		page--;
		displayPageRows();
	}
}

function goToNext() {
	if (page < total) {
		page++;
		displayPageRows();
	}
}

function displayPageRows() {
	for (i = start; i <= end; i++) {
		if (document.getElementById('row' + i)) {
			document.getElementById('row' + i).style.display = 'none';
		}
	}
						
	end = (5 * page);
	start = end - 4;
						
	for (i = start; i <= end; i++) {
		if (document.getElementById('row' + i)) {
			document.getElementById('row' + i).style.display = '';
		}
	}
	
	if ((page == total) && (total > 1)) {
		document.getElementById('next').style.display = 'none';
	} else {
		document.getElementById('next').style.display = '';
	}
	
	if (page == 1) {
		document.getElementById('prev').style.display = 'none';
	} else {
		document.getElementById('prev').style.display = '';
	}
}