hello/nov12_12_6Zindex.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>12-4 position_relative와 absolute 혼합</title>
        <style>
            #header{
                height: 50px;
                background-color: #cccccc;
            }
            #wrap{
                height: 200px;
                position: relative;             
            }
            #content1{
                width: 100px; height: 100px;
                background-color: red;
                border: 2px dashed green;
                position: absolute;
                top: 10px; left: 10px;
                z-index: 20;

            }
            #content2{
                width: 100px; height: 100px;
                background-color: yellow;
                border: 2px dashed green;
                position: absolute;
                top: 50px; left: 50px;
                z-index: 10;
            }
            #footer{
                height: 50px;
                background-color: #cccccc;
            }


        </style>
    </head>
    <body>
        <div id="contain">
            <div id="header">HEADER</div>
            <div id="wrap">
                <div id="content1">content1</div>
                <div id="content2">content2</div>
            </div>
            <div id="footer">FOOTER</div>
        </div>

    </body>
</html>