function showElement(which){
	
	// hide all entry elements ------------------------->
	
	document.getElementById('entries').style.display = 'none';
	document.getElementById('entry1_2').style.display = 'none';
	document.getElementById('entry1_3').style.display = 'none';
	
	// show the correct one ---------------------------->
	
	document.getElementById(which).style.display = 'block';
	
}