Opción jQuery =
Código HTML:
Ver original<!DOCTYPE html>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.js"></script>
<script type="text/javascript">
$(function() {
$('.elem').hide();
$('.buttons').each(function(i) {
obj = $(this);
obj.on('click', function() {
$('#elem' + i).show().siblings().hide();
});
});
});
<div id="elem0">Description 1
</div> <div id="elem1">Description 2
</div> <div id="elem2">Description 3
</div>