.loadingModal {
    display:    none;
    position:   fixed;
    z-index:    9999;
    top:        0;
    left:       0;
    height:     100%;
    width:      100%;
    background: rgba( 255, 255, 255, .8 ) 
                url('../image/loading.gif') 
                50% 50% 
                no-repeat;
}
body.loading .loadingModal {
    overflow: hidden;   
}
body.loading .loadingModal {
    display: block;
}