/* Start by setting display:none to make this hidden.
Then we position it in relation to the viewport window
with position:fixed. Width, height, top and left speak
for themselves. Background we set to 80% white with
our animation centered, and no-repeating */
.pageModal {
    display:    none;
    position:   fixed;
    z-index:    9999999999999;
    top:        0;
    left:       0;
    height:     100%;
    width:      100%;
    background: rgba( 255, 255, 255, .8 ) 
    url('../images/loader.gif') 
    50% 50% 
    no-repeat;
}

/* When the body has the loading class, we turn
the scrollbar off with overflow:hidden */
body.loading .pageModal {
    overflow: hidden;   
}

/* Anytime the body has the loading class, our
modal element will be visible */
body.loading .pageModal {
    display: block;
}