#div1 .active {background:yellow;}
#div1 .active1 {background:red;}
#div1 .active2 {background:pink;}
#div1 .active3 {background:green;}

#div1 .active4 {background:#000;}
#div1 .active5 {background:#666;}
#div1 .active6 {background:#fff;}
#div1 .active7 {background:#f60;}

#div1 div {width:200px; height:200px; background:#CCC; border:1px solid #999; display:none;}