body.loading {
    overflow: hidden;   
}
body.loading .loading-animation {
    display: block;
}
.loading-animation {
    display:    none;
    position:   fixed;
    z-index:    1000;
    top:        0;
    left:       0;
    height:     100%;
    width:      100%;
    background: rgba( 255, 255, 255, .8 ) 
        url('../img/signup-progress.gif') 
        50% 50% 
        no-repeat;
}
.error{
    position: relative;
    font-size: 14px; 
    color: red;
}