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Javascript, css, z-index, div stacking

I want to create a kind of light / thick box that acts on only one DIV inside the page. When my fire fires, the first div (phantom_back) acts the way I want it, but the second, phantom_top sets its self after phantom_back, regardless of its z-index and positioning.

What am I doing wrong?

Here is what I still have:

<html>
<head>
    <script type="text/javascript">
    <!--//
        function phantom_back(image)
        {
            document.getElementById('phantom_back').style.zIndex = 100;
            document.getElementById('phantom_back').style.height = '100%';
            document.getElementById('phantom_back').style.width = '100%';
            phantom_top();
        }

        function phantom_top(image)
        {
            document.getElementById('phantom_top').style.zIndex = 102;
            document.getElementById('phantom_top').style.height = 600;
            document.getElementById('phantom_top').style.width = 600;
            document.getElementById('phantom_top').style.top = 0;
            document.getElementById('phantom_top').style.left = 0;
        }
    //-->
    </script>
</head>
<body>
    <a href="#" onclick="phantom_back()">Change</a>

    <div style="height: 700px; width: 700px; border: 2px black solid; margin:0 auto; background-color: red;" id="overlord">
        <div style="height: 10px; width: 10px; position: relative; z-index: -1; background-color: #000000; filter:alpha(opacity=50); -moz-opacity:0.5; -khtml-opacity: 0.5; opacity: 0.5;" id="phantom_back"></div>

        <div style="height: 10px; width: 10px; position: relative; z-index: -3; margin: 0 auto; background-color: green;" id="phantom_top">asdf</div>
    </div>

</body>
</html>

I wandered why not one of the lessons I could find offers something like this.

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3 answers

, . phantom_back , , . z-, .

<html>
<head>
    <script type="text/javascript">
    <!--//
        function phantom_back(image)
            {
                document.getElementById('phantom_back').style.height = 700;
                document.getElementById('phantom_back').style.width = 700;
                document.getElementById('phantom_back').style.zIndex = 50;
                phantom_top();
            }

        function phantom_top()
            {
                document.getElementById('phantom_top').style.height = 600;
                document.getElementById('phantom_top').style.width = 600;
                document.getElementById('phantom_top').style.visibility = "visible";
            }
    //-->
    </script>
</head>
<body>
    <a href="#" onclick="phantom_back()">Change</a>

    <div style="height: 700px; width: 700px; border: 2px black solid; margin:0 auto; background-color: red;" id="overlord">
        <div style="height: 10px; width: 10px; position: absolute; z-index: -1; background-color: #000000; filter:alpha(opacity=50); -moz-opacity:0.5; -khtml-opacity: 0.5; opacity: 0.5;" id="phantom_back"></div>

        <div style="margin: 0 auto; text-align: center; height: 10px; width: 10px;  position: relative; z-index: 102; top: 10px; background-color: white; visibility: hidden;" id="phantom_top"><br /><br /><img src="load.gif"></div>
    </div>

</body>
</html>
+5

phantom_top : , phantom_back.

0

Remember to combine the px line in height and width. You don't need px values ​​for z-index

document.getElementById('phantom_back').style.height = 700 + "px";

Like this.

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Source: https://habr.com/ru/post/1702929/

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