anchor.diff:          }
   
           function checkRegexp(field, regexp, example) {
  -            if (!( regexp.test(field.val()) )) {
  +            var emailAddress = $.trim(field.val());
  +            if (!( regexp.test(emailAddress) )) {
                   field.addClass("ui-state-error");
                   updateTips(example);
                   return false;
  
positive.code:                 {width:"60px", text:"Send", id:"send-button", click:function () {
                      var bValid = true;
                      allFields.removeClass("ui-state-error");
  
                      bValid = bValid && (email.val().trim().length == 0
                              || (checkRegexp(email, /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i, "Email format non valid")
                              && checkLength(email, "email", 6, 80)));
                      bValid = bValid && checkLength(feedback, "feedback", 3, 10000);
  
negative.code:         }
  
          function checkLength(field, fieldName, min, max) {
              var emailAddress = $.trim(field.val());
              if (emailAddress.length > max || emailAddress.length < min) {
                  field.addClass("ui-state-error");
                  updateTips("Length of the " + fieldName + " field must be between " +
                          min + " and " + max + " characters.");
  