Untitled

<html>
 <head>
  <link rel="stylesheet" type="text/css" href="jquery-ui.css" />
  <script type="text/javascript" src="jquery-1.4.4.js"></script>
  <script type="text/javascript" src="jquery.validate.js"></script>
  <script type="text/javascript" src="jquery.validate.unobtrusive.js"></script>
  <script type="text/javascript" src="jquery-ui.js"></script>
  <script type="text/javascript">
      $(document).ready(function () {
    $('.date').datepicker({ dateFormat: 'dd/mm/yy' });
            $.validator.addMethod("dateRule", function(value, element) {
      return true;
    },
    "Error message");
      });
  </script>
 </head>
 <body>
    <form>
        Date: <input type="text" name="myDate" class="date dateRule" />
        <input type="submit" />
    </form>
 </body>
</html>

jQuery.validator.methods["date"] = function (value, element) { return true; }

$.validator.methods.date = function (value, element) {
    return this.optional(element) || Globalize.parseDate(value, "d/M/y", "en");
}

jQuery.validator.methods.date = function(value, element) {
    var dateRegex = /^(0?[1-9]/|[12]d/|3[01]/){2}(19|20)dd$/;
    return this.optional(element) || dateRegex.test(value);
};

jQuery.validator.addMethod(
    "dateITA",
    function(value, element) {
        var check = false;
        var re = /^d{1,2}/d{1,2}/d{4}$/;
        if( re.test(value)){
            var adata = value.split('/');
            var gg = parseInt(adata[0],10);
            var mm = parseInt(adata[1],10);
            var aaaa = parseInt(adata[2],10);
            var xdata = new Date(aaaa,mm-1,gg);
            if ( ( xdata.getFullYear() == aaaa )
                   && ( xdata.getMonth () == mm - 1 )
                   && ( xdata.getDate() == gg ) )
                check = true;
            else
                check = false;
        } else
            check = false;
        return this.optional(element) || check;
    },
    "Please enter a correct date"
);

yepnope({
    test: isNaN(Date.parse("23/2/2012")),
    nope: 'http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.0/additional-methods.min.js',
    complete: function () {
        $.validator.methods.date = $.validator.methods.dateITA
    }
});

(function ($) {
    var invokeTestDate = function () {
        return $.validator.methods.date.call({
            optional: function () {
                return false;
            }, (new Date(2012,8,23)).toLocaleDateString(), null);
    };
    if (invokeTestDate()) {
        return;
    }

    // http://docs.jquery.com/Plugins/Validation/Methods/date

    $.validator.methods.date = function (value, element) {
        //ES - Chrome does not use the locale when new Date objects instantiated:
        //return this.optional(element) || !/Invalid|NaN/.test(new Date(value));
        var d = new Date();
        return this.optional(element) || !/Invalid|NaN/.test(new Date(d.toLocaleDateString(value)));
    }
})(jQuery);

if ($.validator) {
    $.validator.addMethod("date",
        function (value, element, params) {
            if (this.optional(element)) {
                return true;
            }

            var ok = true;
            try {
                $.datepicker.parseDate("dd/mm/yy", value);
            }
            catch (err) {
                ok = false;
            }
            return ok;
        });
}

$.validator.addMethod(
         "date",
         function(value, element) {
              var check = false;
              var re = /^d{1,2}/d{1,2}/d{4}$/;
              var reBR = /^d{4}-d{1,2}-d{1,2}$/;
              if( re.test(value)){
                   var adata = value.split('/');
                   var gg = parseInt(adata[0],10);
                   var mm = parseInt(adata[1],10);
                   var aaaa = parseInt(adata[2],10);
                   var xdata = new Date(aaaa,mm-1,gg);
                   if ( ( xdata.getFullYear() == aaaa ) && ( xdata.getMonth () == mm - 1 ) && ( xdata.getDate() == gg ) )
                        check = true;
                   else
                        check = false;
              } else if( reBR.test(value)){
                   var adata = value.split('-');
                   var aaaa = parseInt(adata[0],10);
                   var mm = parseInt(adata[1],10);
                   var gg = parseInt(adata[2],10);
                   var xdata = new Date(aaaa,mm-1,gg);
                   if ( ( xdata.getFullYear() == aaaa ) && ( xdata.getMonth () == mm - 1 ) && ( xdata.getDate() == gg ) )
                        check = true;
                   else
                        check = false;
              } else
                   check = false;
                   console.log(check);
              return this.optional(element) || check;
         },
         "Por favor insira uma data válida"
    );

$.validator.addMethod(
    "dateRule",
    function(value, element) {
        return value.match(/^dd?/dd?/dd$/);
    },
    "Please enter a date in the format dd/mm/yy"
);

^((0?[13578]|10|12)(-|/)(([1-9])|(0[1-9])|([12])([0-9]?)|(3[01]?))(-|/)((19)([2-9])(d{1})|(20)([01])(d{1})|([8901])(d{1}))|(0?[2469]|11)(-|/)(([1-9])|(0[1-9])|([12])([0-9]?)|(3[0]?))(-|/)((19)([2-9])(d{1})|(20)([01])(d{1})|([8901])(d{1})))$

jQuery.extend(jQuery.validator.methods, {
        date: function (value, element) {
            var isChrome = window.chrome;
            // make correction for chrome
            if (isChrome) {
                var d = new Date();
                return this.optional(element) ||
                !/Invalid|NaN/.test(new Date(d.toLocaleDateString(value)));
            }
            // leave default behavior
            else {
                return this.optional(element) ||
                !/Invalid|NaN/.test(new Date(value));
            }
        }
    });

jQuery.validator.methods["date"] = function (value, element){
        var shortDateFormat = "dd/mm/yy";
        var res = true;
        try {
            $.datepicker.parseDate(shortDateFormat, value);
        } catch (error) {
            res = false;
        }
        return res;
    }