input {}
input.error { display:block;border: 1px solid red;}
label.error {
    background: url('unchecked.gif') no-repeat;
    padding-left: 16px;
    margin-left: .3em;
  }
  label.valid {
    background: url('checked.gif') no-repeat;
    display: block;
    width: 16px;
    height: 16px;
  }