z-index in table

by Mohammad Ghanbari

HTML

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Stacking and float</title>
    <style type="text/css">

    div {
        font: 12px Arial;
    }

    span.bold { font-weight: bold; }

    #absdiv1 {
        opacity: 0.99;
        position: absolute;
        width: 150px;
        height: 200px;
        top: 10px;
        right: 140px;
        border: 1px dashed #990000;
        background-color: #ffdddd;
        text-align: center;
    }

    #normdiv {
        opacity: 0.99;
        height: 100px;
        border: 1px dashed #999966;
        background-color: #ffffcc;
        margin: 0px 10px 0px 10px;
        text-align: left;
    }

    #flodiv1 {
        opacity: 0.99;
        margin: 0px 10px 0px 20px;
        float: left;
        width: 150px;
        height: 200px;
        border: 1px dashed #009900;
        background-color: #ccffcc;
        text-align: center;
    }

    #flodiv2 {
      opacity: 0.99;
        margin: 0px 20px 0px 10px;
        float: right;
        width: 150px;
        height: 200px;
        border: 1px dashed #009900;
        background-color: #ccffcc;
        text-align: center;
    }

    #absdiv2 {
        opacity: 0.7;
        position: absolute;
        width: 150px;
        height: 100px;
        top: 130px;
        left: 100px;
        border: 1px dashed #990000;
        background-color: #ffdddd;
        text-align: center;
    }

</style>
</head>

<body>
    <br /><br />

    <div id="absdiv1">
        <br /><span class="bold">DIV #1</span>
        <br />position: absolute;
    </div>

    <div id="flodiv1">
        <br /><span class="bold">DIV #2</span>
        <br />float: left;
    </div>

    <div id="flodiv2">
        <br /><span class="bold">DIV #3</span>
        <br />float: right;
    </div>

    <br />

    <div id="normdiv">
        <br /><span class="bold">DIV #4</span>
        <br />no positioning
    </div>

    <div id="absdiv2">
        <br /><span class="bold">DIV #5</span>
        <br...