#c{
   position: fixed; 
   top:0; 
   left: 0; 
   z-index:-1; 
   opacity:0.8;
}
* {
    margin: 0;
    padding: 0;
    border: 0;
}
#div_digg1 {
    padding: 5px;
    position: fixed;
    _position: absolute;
    z-index: 1000;
    bottom: 5%;
    left: 3.5%;
    _left: 15px;
    border: 0;
}