jq(document).ready(function(){	
  jq('form#contactarAigasa').validate({    
     rules: { sender_fullname : {required:true},
              sender_from_address: { required: true, email:true },
              empresa: { required: true },
              telefono: {required:true},
     },
     messages: { sender_fullname: 'Vacío',
     	           sender_from_address: 'Vacío',
                 empresa: 'Vacío',
                 telefono: 'Vacío'                 
     },
     errorElement: 'div',
     highlight: function(element, errorClass) {
       jq(element).addClass('error');
     },
     errorPlacement: function(error, element){}
  });
});