.non-visible {
    display: none;
}

.hidden-text {
    /* hide text for IE and Gecko */
    font-size: 0px !important;
    letter-spacing: -99999px !important; 
    text-decoration: none !important;

    /* hide text for Opera */
    overflow: hidden !important; 
    text-indent: -9999px !important;
}

.hidden-text a {
    text-decoration: none !important;
}