$(document).ready(function(){
    $("#frmCnt").validate({
	    errorElement: "span",
		rules: {
			nome: {
				required: true,
				minlength: "3"
			},
			email: {
				required: true,
				email: true
			},
			desc: {
				required: true,
				minlength: "5"
			}
		},
	    messages: {
			nome: {
				required: "Nome richiesto",
				minlength: "Nome troppo corto"
			},
			email: {
				required: "Email mancante",
				email: "Email non valida"
			},
			desc: {
				required: "Messaggio mancante",
				minlength: "Messaggio troppo corto"
			}
		}
	});
  });