quickndirtyvalidation.js

var reggie = {
  email: /^[-a-z0-9~!$%^&*_=+}{\'?]+(\.[-a-z0-9~!$%^&*_=+}{\'?]+)*@([a-z0-9_][-a-z0-9_]*(\.[-a-z0-9_]+)*\.(aero|arpa|biz|com|coop|edu|gov|info|int|mil|museum|name|net|org|pro|travel|mobi|[a-z][a-z])|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(:[0-9]{1,5})?$/i,
  password: /^[a-z0-9]{4,25}$/i
},
  valid = {
    email: false,
    password: false
  },
  data = {};

$('#submit').prop('disabled',true);

$('.validate').on('blur', function(){
    $(this).addClass('dirty');
    validate($(this));
});

$('.validate').on('keyup', function(){
  validate($(this));
});

$('#submit').on('click', function(e){
  e.preventDefault();
  submit(data);
});

function validate($field) {
  
  var id  = $field.attr('id'),
    val = $field.val();
  
  valid[id] = reggie[id].test(val);
   
  if (!valid[id]) {
    if ($field.is('.dirty')) {
      $field.addClass('error');
    }    
  }
  else {
    data[id] = val;
    $field.removeClass('error');
  }
  $('#submit').prop(
    'disabled', 
    !valid.email || !valid.password
  );
}

function submit(data) {
  //console.log(data);
}