.bold {
    font-weight: bold;
    font: 12px Arial;
}
#div1,
#div3 {
    height: 80px;
    position: relative;
    border: 1px dashed #669966;
    background-color: #ccffcc;
    padding-left: 5px;
}
#div2 {
    opacity: 0.8;
    z-index: 1;
    position: absolute;
    width: 150px;
    height: 200px;
    top: 20px;
    left: 170px;
    border: 1px dashed #990000;
    background-color: #ffdddd;
    text-align: center;
}
#div4 {
    opacity: 0.8;
    z-index: 2;
    position: absolute;
    width: 200px;
    height: 100px;
    top: 65px;
    left: 50px;
    border: 1px dashed #000099;
    background-color: #ddddff;
    text-align: left;
    padding-left: 10px;
}