Keep footer at the bottom of the page (with scrolling if needed)

Replace Height with overflow:auto; & give body a position

html,body {
    position:relative; <!--Also give it a position -->
    margin:0;
    padding:0;
    overflow:auto; <!-- HERE -->
}

Position the footer to be relative to body

/* --- Footer --- */
.footerbar { 
    position: relative; <!-- HERE -->
    width: 100%;
    bottom: 0;
    color: white;
    background-color: #202020;
    font-size: 12px; 
}

It at all possible it is always better to relatively position your elements, especially your main elements, like footers in this case.

Short Page Edit

min-height:400px; <!-- Give this a real number like 400px 
                  or whatever you want...dont leave it to 100% as -->
}

I would suggest the "sticky footer" approach. See the following link:

http://css-tricks.com/snippets/css/sticky-footer/