$(document).ready( function() {
	var emTesto = 1.2;
	$('a.btn-testo-piu').click(function() {
		emTesto = emTesto + 0.1;
		$('.textcontent').css('font-size', emTesto + 'em');
		$('.textcontent').css('line-height', (emTesto + 0.2) + 'em');
	});
    $('a.btn-testo-meno').click(function() {
    	emTesto = emTesto - 0.1;
		$('.textcontent').css('font-size', emTesto + 'em');
		$('.textcontent').css('line-height', (emTesto + 0.2) + 'em');
	});
});