#main { width:960px; position:absolute; top:50%; left:0; margin:-85px 0 0 0; }

.block { width:180px; height:180px; float:left; margin:0 5px 0 0; }
.last { margin-right:0; }

/*---------------
ZOOM DEFAULT
---------------*/

.zoom { 
    width:180px; 
    height:180px; 
    display:block; 
    position:relative; 
    overflow:hidden; 
    border:1px solid #ddd; 
    background:#fff url(../images/loader.gif) no-repeat center;
}

    .zoom img { display:none }

        .zoomOverlay {
            position:absolute;
            top:0; left:0;
            bottom:0; right:0;
            display:none;
            background-image:url(../images/zoom.png);
            background-repeat:no-repeat;
            background-position:center;
        }