[css] CSS: Auto resize div to fit container width

#wrapper
{
    min-width:960px;
    margin-left:auto;
    margin-right:auto;
    position-relative;
}
#left
{
    width:200px;
    position: absolute;
    background-color:antiquewhite;
    margin-left:10px;
    z-index: 2;
}
#content
{
    padding-left:210px;
    width:100%;
    background-color:AppWorkspace;
    position: relative;
    z-index: 1;
}

If you need the whitespace on the right of #left, then add a border-right: 10px solid #FFF; to #left and add 10px to the padding-left in #content