.container {
width:425px;
height:325px;
margin:0 auto;
border:1px solid #ddd;
position:relative;
overflow:hidden;
}
.container:hover .btn {
display:block;
}
img {
width:425px;
height:100%;
float:left;
}
.btn {
display:inline-block;
border:20px solid transparent;
position:absolute;
top:40%;
cursor:pointer;
opacity:.5;
display:none;
}
.btn:hover {
opacity:1;
}
#prev {
border-right:20px solid pink;
}
#next {
border-left:20px solid pink;
right:0;
}
.imgCon {
position:absolute;
width:1700px;
height:100%;
}