您可以通过扩展jquery验证器

you can add custom rules by extending the jquery validator

   jQuery.validator.addMethod("customdate", function(value, element) { 
   return this.optional(element) || {your rules}
     }, "eg YYYY-MM-DD");

在此处查看

http://docs.jquery.com/Plugins/Validation/Validator/addMethod#namemethodmessage

仅用于数字，您无需编写自己的规则.它已经包含功能，尝试数字和数字

For number only, you don't need to write your own rules.It already include the feature,try digits and number

  1  $("#form").validate({
        rules:{
            inputtype:{required:true,digits:true}

        },
        messages:{
            inputtype:{required:"Please provide Number",digits,"Number Only!"}

        }
    });

    2.  $("#form").validate({
        rules:{
            inputtype:{required:true,number:true}

        },
        messages:{
            inputtype:{required:"Please provide Number",number,"Number Only!"}

        }
    });