Put a div on bottom of the screen, not page

If you want it on the bottom and always at the bottom, you have to use position: fixed.
You could try this:

#info { 
    height: 40px; 
    position: fixed; 
    bottom:0%;
    width:100%; 
    background-color: #393838; 
    opacity: 1;
}

http://jsfiddle.net/rX4nd/1/