$(document).ready(function() {
		
	$("#datainizio").change(function () { 
		var datestart = "";
		var campi = "";
		datestart = $("#datainizio").attr("value");
		
		if(datestart == null){
			campi=" ";
		}	
		else{
			campi="<input type='hidden' name='idCardLevel' value='138'/>";
		}
		$("#add-datestart").html(campi);
		
	});
});