function controlMail(myform) { 
  	var allarme='';
	var espressione = /^[_a-z0-9+-]+(\.[_a-z0-9+-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)+$/;
	if (!espressione.test(myform.mail.value))
	{
	    allarme="Inserire un indirizzo e-mail valido!";
	}
	if(allarme!='') {
		alert(allarme);
		return false;
	}	
	else
		return true;
}

$(document).ready(function(){
	//hide message_body after the first one
	$(".message_list .message_body").hide();
	//toggle message_body
	$(".message_head").click(function(){
		$(this).next(".message_body").slideToggle(500)
		return false;
	});
});

$(document).ready(function(){
	//hide message_body after the first one
	$(".message_list2 .message_body").hide();
	//toggle message_body
	$(".message_head").click(function(){
		$(this).next().next(".message_body").slideToggle(500)
		return false;
	});
});