jdaigle/gist:1083608

## gistfile1.txt
<html>
  <head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
    <script>
      if (typeof (nfvalidate) == "undefined") nfvalidate = {};

      // An array of validators to push your validators to
      nfvalidate.validators = new Array();

      nfvalidate.validators.push({
        name: "validation-required",
        doValidate: function(e) { return !$(e).data("validation-required") || $(e).val() != ''; },
        errorMessage: function(e) { return "Field is required"; }
      });

      nfvalidate.validators.push({
        name: "validation-maxlength",
        doValidate: function(e) {
          return !($(e).val().length > this.getMaxLength(e));
        },
        errorMessage: function(e) { return "Field cannot be more than " + this.getMaxLength(e) + " characters"; },
        getMaxLength: function(e) { return parseInt($(e).data("validation-maxlength")); }
      });

      // Finds an Error Message data value or undefined
      nfvalidate.findErrorMessage = function(element, validator) {
        return $(element).data(validator.name + "-message");
      }

      // Returns an array of validation errors for the specific element
      nfvalidate.validateElement = function(element) {
        var errors = new Array();
        $.each(nfvalidate.validators, function(i, validator) {
          if ($(element).data(validator.name) === undefined) return;
          if (validator.doValidate(element) == false) {
            var errorMessage = nfvalidate.findErrorMessage(element, validator);
            if (errorMessage === undefined) errorMessage = validator.errorMessage(element);
            errors.push({ element: element, message: errorMessage });
          }
        });
        return errors;
      };

      // Finds all elements that need validation within the selected element (such as a form) and
      // returns an array of all validation errors
      nfvalidate.validate = function(selector) {
        var validationSelectors = $.map(nfvalidate.validators, function(e, i) { return "[data-"+ e.name + "]"; }).join(",");
        var elementsToValidate = $(selector).find(validationSelectors);
        return $.map(elementsToValidate, function(e, i) { return nfvalidate.validateElement(e); });
      };

      $(function() {
        $("#myForm").submit(function(e) {
          var errors = nfvalidate.validate(this);
          for (i in errors) {
            alert(errors[i].message);
          }
          if (errors.length > 0) e.preventDefault();
        });
      });
    </script>
  </head>
  <body>
    <form id="myForm">
        Required: <input type="text" data-validation-required="true" /><br />
        Not Required: <input type="text" data-validation-required="false" /><br />
        Max Length: <input type="text" data-validation-maxlength="50" /><br />
        Required: <input type="text" data-validation-required="true" data-validation-required-message="my field is required" /><br />
        Max length: <input type="text" data-validation-maxlength="60" data-validate-maxlength-message="cannot be more than 60 chars!!" /><br />
        Max Length And Required: <input type="text" data-validation-required="true" data-validation-maxlength="50" /><br />
        <input type="submit" value="do submit">
    </form>
  </body>
</html>
	<html>
	<head>
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
	<script>
	if (typeof (nfvalidate) == "undefined") nfvalidate = {};

	// An array of validators to push your validators to
	nfvalidate.validators = new Array();

	nfvalidate.validators.push({
	name: "validation-required",
	doValidate: function(e) { return !$(e).data("validation-required") \|\| $(e).val() != ''; },
	errorMessage: function(e) { return "Field is required"; }
	});

	nfvalidate.validators.push({
	name: "validation-maxlength",
	doValidate: function(e) {
	return !($(e).val().length > this.getMaxLength(e));
	},
	errorMessage: function(e) { return "Field cannot be more than " + this.getMaxLength(e) + " characters"; },
	getMaxLength: function(e) { return parseInt($(e).data("validation-maxlength")); }
	});

	// Finds an Error Message data value or undefined
	nfvalidate.findErrorMessage = function(element, validator) {
	return $(element).data(validator.name + "-message");
	}

	// Returns an array of validation errors for the specific element
	nfvalidate.validateElement = function(element) {
	var errors = new Array();
	$.each(nfvalidate.validators, function(i, validator) {
	if ($(element).data(validator.name) === undefined) return;
	if (validator.doValidate(element) == false) {
	var errorMessage = nfvalidate.findErrorMessage(element, validator);
	if (errorMessage === undefined) errorMessage = validator.errorMessage(element);
	errors.push({ element: element, message: errorMessage });
	}
	});
	return errors;
	};

	// Finds all elements that need validation within the selected element (such as a form) and
	// returns an array of all validation errors
	nfvalidate.validate = function(selector) {
	var validationSelectors = $.map(nfvalidate.validators, function(e, i) { return "[data-"+ e.name + "]"; }).join(",");
	var elementsToValidate = $(selector).find(validationSelectors);
	return $.map(elementsToValidate, function(e, i) { return nfvalidate.validateElement(e); });
	};

	$(function() {
	$("#myForm").submit(function(e) {
	var errors = nfvalidate.validate(this);
	for (i in errors) {
	alert(errors[i].message);
	}
	if (errors.length > 0) e.preventDefault();
	});
	});
	</script>
	</head>
	<body>
	<form id="myForm">
	Required: <input type="text" data-validation-required="true" /><br />
	Not Required: <input type="text" data-validation-required="false" /><br />
	Max Length: <input type="text" data-validation-maxlength="50" /><br />
	Required: <input type="text" data-validation-required="true" data-validation-required-message="my field is required" /><br />
	Max length: <input type="text" data-validation-maxlength="60" data-validate-maxlength-message="cannot be more than 60 chars!!" /><br />
	Max Length And Required: <input type="text" data-validation-required="true" data-validation-maxlength="50" /><br />
	<input type="submit" value="do submit">
	</form>
	</body>
	</html>