/* 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
   speak for themselves. Background we set to 80% white with
   our animation centered, and no-repeating */
#mask {
	display: none;
	position: fixed;
	z-index: 1000;
	top: 0;
	left: 0;
	height: 100%;
	width: 100%;
	background-color: rgba( 0, 0, 0, .5 );
	background-image: url('../images/ajax-loader.gif');
	background-position: 50% 50%;
	background-repeat: no-repeat;
}

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

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