skeep

var cat = function(obj){
  //this is where I copy all the attributes of the passed object to the constructure
  for (attr in obj){
    this[attr] = obj[attr];
  }
  //publice method
  this.talk = function(){
    console.log('meeow!!!');
  };
};

skeep

var validator = (function () {
  function trim(str) {
    return str.replace(/^\s+|\s+$/g, '');
  }

  function isEmail(field) {
    if (field) {
      var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
      if (!filter.test(field)) {
        return false;