jQuery wrapper of Parsley.js

In a project, I have a lot of HTML forms without validation and I want to add a front end validation, in a quick way. I start looking for a library and I met Parsley.js. It's a good library, but if I decided to use it I would have to modify all the forms in my application.

So there is where this code is born. It's for automatically binding a set of rules you define to a form.

//Only basic types and validators.
$.fn.parsley.mapping = {
//Types
'alphanum': {'parsley-type':    'alphanum'},
'email':    {'parsley-type':    'email'},
'url':  {'parsley-type':    'url'},
'number':   {'parsley-type':    'number'},
'digits':   {'parsley-type':    'digits'},
'dateIso':  {'parsley-type':    'dateIso'},
'phone':    {'parsley-type':    'phone'},

//Validators
'required': {'parsley-required':    'true'},    
'notblank': {'parsley-notblank':    'true'},
'minlength':    {'parsley-minlength': '?'},
'maxlength':    {'parsley-maxlength': '?'},
'min':  {'parsley-min': '?'},   
'max':  {'parsley-max': '?'}
}

//Only inputs and textareas
$.fn.parsley.fields = 'input:visible, textarea:visible';

!function ($) {
$.fn.generalValidation = function( validationRules ) {

var name, validations, validationName, validationValue, att, key, value
, form = $( this )
, addValidations = function( validationRules ){
if(validationRules === undefined){
console.log('Error!!! You need to add the validation rules parameter');
validationRules = {};
}
$( form ).find( $.fn.parsley.fields ).each(function(){
name = $( this ).attr('name');
validations = validationRules[name];

if(validations == undefined) return true;

for(validation in validations){
validationName = validations[validation];
validationValue = '';
if(validationName.indexOf(':') !== -1){
validationValue = validationName.substr(validationName.indexOf(':')+1, validationName.length);
validationName = validationName.substr(0, validationName.indexOf(':'));
}

att = $.fn.parsley.mapping[validationName];
if(att !== undefined){
$.map(att, function (v, k) { key = k; value = v; });
value = (value === '?') ? validationValue : value;
$(this).attr(key, value);
}
}
});
return true;
}
, callParsley = function( form ) {
form.parsley();
};

if(addValidations( validationRules )){
callParsley( form );
}
}
} ( window.jQuery );

Here is a JSFiddle.

This is my first plugin in jQuery. Would you improve something in the code? Do you find this useful?