#tabs  {
    position: fixed;
    height: 100%;
    width: 97%;
    top: 93%;
    overflow: auto;
    border : 1px solid gray
}
#tabs div[id^='tabs']{
    padding: 0;
    height: 120%;
}
#tabs div[id^='tabs'] pre {
    min-height: 100%;
}
#tabs div[id^='tabs'] code{
    min-height: 100%;
}