function show(elm) {
	var elm = elm;
	
	document.getElementById(elm).style.display = "block";
	
	var content = document.getElementById('show_hide');
	content.innerHTML = '<a href="javascript:hide(\''+elm+'\')" class="hide">nascondi le tue preferenze</a>';
	
}

function hide(elm) {
	var elm = elm;
	
	document.getElementById(elm).style.display = "none";
	
	var content = document.getElementById('show_hide');
	content.innerHTML = '<a href="javascript:show(\''+elm+'\')" class="show">modifica le tue preferenze</a>';
}

function showBox(elm) {
	var elm = elm;
	
	document.getElementById(elm).style.display = "block";
}

function hideBox(elm) {
	var elm = elm;
	
	document.getElementById(elm).style.display = "none";
}