HTML和CSS问题：两个绝对定位元素之间的元素需要正确调整大小

#header
{
    position: absolute;
    top: 0%;
    height: 24px;
}
#body
{
    position: absolute;
    top: 24px;
    bottom: 20%;
    overflow: auto;
}
#footer
{
    position: absolute;
    bottom: 0px;
    height: 17.2%;
    min-height: 80px;
    overflow: auto;
}
#header
{
    position: absolute;
    top: 0%;