body, html{
    width:100%; 
    height:100%;
}
a {
    width:100%; 
    height:100%; 
    background-image:url(/assets/temp.jpg);
    border:none;
    display:block;
   }

div {
    width:100%;
    height:100%;
    /*background-image:url(/assets/temp.jpg);*/
    display:block;
        }