#email_check {
    display: none;
}

label.error {
    display: block !important;
    padding: 0;
    text-indent: -9999px;
    font-size: 0;
    position: absolute;
    right: 5px;
    top: 0;
    background: url(../images/error.png) left center no-repeat;
    width: 24px;
    height: 100%;
}

.valid label.error {
    background: url(../images/success.png) left center no-repeat;
}