.imagemap_bot {position:relative;width:device-width;}
img {display:block;}
.link1 {position:absolute;top:0%;left:0%;width:25%;height:100%;}
.link2 {position:absolute;top:0%;left:25%;width:25%;height:100%;}
.link3 {position:absolute;top:0%;left:50%;width:25%;height:100%;}
.link4 {position:absolute;top:0%;left:75%;width:25%;height:100%;}