.back {
    position:relative;
    z-index: -1;
    min-height:350px
}

.front {
    position:relative;
    z-index: 1
}
.front2 {
    position:relative;
    z-index: 2
}

.wrapgrey{
   background-color: #bfbfbf;
	padding: 20px 20px 20px 20px;
	margin: 0px 0px -26px 0px;
	max-width: 100px;
	text-align: center;
	text-decoration: none;
}