#split-page-holder
{
    overflow: hidden;
    margin-bottom: 20px;
}

#split-page-holder #split-left-panel
{
    float: left;  
    width: 459px;
    border-right: solid 1px #81c398;
    min-height: 300px;
    padding-right: 20px;
}

#split-page-holder #split-right-panel
{
    float: left;  
    width: 459px;
    padding-left: 20px;
}