#graph_holder{
    height:305px;
    overflow:auto;
    overflow-x:hidden;
    position:relative;
    margin-bottom:1em;
}
#commit_highlighter, #commit_graph{
    position:absolute;
    top:0;
    left:0;
    z-index:0;
}
#commit_graph{
    z-index: 1;
}