jQuery.validator.addMethod("maxWords", function(value, element, params) { 
    return this.optional(element) || value.match(/\b\w+\b/g).length < params; 
}, $.format("Please enter {0} words or less.")); 
 
jQuery.validator.addMethod("minWords", function(value, element, params) { 
    return this.optional(element) || value.match(/\b\w+\b/g).length >= params; 
}, $.format("Please enter at least {0} words.")); 
 
jQuery.validator.addMethod("rangeWords", function(value, element, params) { 
    return this.optional(element) || value.match(/\b\w+\b/g).length >= params[0] && value.match(/bw+b/g).length < params[1]; 
}, $.format("Please enter between {0} and {1} words."));


jQuery.validator.addMethod("letterswithbasicpunc", function(value, element) {
    return this.optional(element) || /^[a-z-.,()'\"\s]+$/i.test(value);
}, "Letters or punctuation only please");  

jQuery.validator.addMethod("alphanumeric", function(value, element) {
    return this.optional(element) || /^\w+$/i.test(value);
}, "Letters, numbers, spaces or underscores only please");  

jQuery.validator.addMethod("lettersonly", function(value, element) {
    return this.optional(element) || /^[a-z]+$/i.test(value);
}, "Letters only please"); 

jQuery.validator.addMethod("nowhitespace", function(value, element) {
    return this.optional(element) || /^\S+$/i.test(value);
}, "No white space please"); 

jQuery.validator.addMethod("ziprange", function(value, element) {
    return this.optional(element) || /^90[2-5]\d\{2}-\d{4}$/.test(value);
}, "Your ZIP-code must be in the range 902xx-xxxx to 905-xx-xxxx");

/**
* Return true, if the value is a valid vehicle identification number (VIN).
*
* Works with all kind of text inputs.
*
* @example <input type="text" size="20" name="VehicleID" class="{required:true,vinUS:true}" />
* @desc Declares a required input element whose value must be a valid vehicle identification number.
*
* @name jQuery.validator.methods.vinUS
* @type Boolean
* @cat Plugins/Validate/Methods
*/ 
jQuery.validator.addMethod(
    "vinUS",
    function(v){
        if (v.length != 17)
            return false;
        var i, n, d, f, cd, cdv;
        var LL    = ["A","B","C","D","E","F","G","H","J","K","L","M","N","P","R","S","T","U","V","W","X","Y","Z"];
        var VL    = [1,2,3,4,5,6,7,8,1,2,3,4,5,7,9,2,3,4,5,6,7,8,9];
        var FL    = [8,7,6,5,4,3,2,10,0,9,8,7,6,5,4,3,2];
        var rs    = 0;
        for(i = 0; i < 17; i++){
            f = FL[i];
            d = v.slice(i,i+1);
            if(i == 8){
                cdv = d;
            }
            if(!isNaN(d)){
                d *= f;
            }
            else{
                for(n = 0; n < LL.length; n++){
                    if(d.toUpperCase() === LL[n]){
                        d = VL[n];
                        d *= f;
                        if(isNaN(cdv) && n == 8){
                            cdv = LL[n];
                        }
                        break;
                    }
                }
            }
            rs += d;
        }
        cd = rs % 11;
        if(cd == 10){cd = "X";}
        if(cd == cdv){return true;}
        return false; 
    },
    "The specified vehicle identification number (VIN) is invalid."
);

/**
  * Return true, if the value is a valid date, also making this formal check dd/mm/yyyy.
  *
  * @example jQuery.validator.methods.date("01/01/1900")
  * @result true
  *
  * @example jQuery.validator.methods.date("01/13/1990")
  * @result false
  *
  * @example jQuery.validator.methods.date("01.01.1900")
  * @result false
  *
  * @example <input name="pippo" class="{dateITA:true}" />
  * @desc Declares an optional input element whose value must be a valid date.
  *
  * @name jQuery.validator.methods.dateITA
  * @type Boolean
  * @cat Plugins/Validate/Methods
  */
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"
);
function getRandomArbitary(min, max){
   return Math.floor(Math.random() * (max - min + 1)) + min;
}

/**
 * matches US phone number format 
 * 
 * where the area code may not start with 1 and the prefix may not start with 1 
 * allows '-' or ' ' as a separator and allows parens around area code 
 * some people may want to put a '1' in front of their number 
 * 
 * 1(212)-999-2345
 * or
 * 212 999 2344
 * or
 * 212-999-0983
 * 
 * but not
 * 111-123-5434
 * and not
 * 212 123 4567
 */
jQuery.validator.addMethod("phone", function(phone_number, element) {
    phone_number = phone_number.replace(/\s+/g, ""); 
    return this.optional(element) || phone_number.length > 9 &&
        phone_number.match(/^(1-?)?(\([2-9]\d{2}\)|[2-9]\d{2})-?[2-9]\d{2}-?\d{4}$/);
}, "Please specify a valid phone number");

// TODO check if value starts with <, otherwise don't try stripping anything
jQuery.validator.addMethod("strippedminlength", function(value, element, param) {
    return jQuery(value).text().length >= param;
}, jQuery.format("Please enter at least {0} characters"));

// same as email, but TLD is optional
jQuery.validator.addMethod("email2", function(value, element, param) {
    return this.optional(element) || /^((([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.test(value); 
}, jQuery.validator.messages.email);

// same as url, but TLD is optional
jQuery.validator.addMethod("url2", function(value, element, param) {
    return this.optional(element) || /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([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])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(value); 
}, jQuery.validator.messages.url);