Why does this code not resize the image?

D

dm2015-05-02 15:34:33

JavaScript

dm, 2015-05-02 15:34:33

The JavaScript book has this example:

<head>
  <script>
      function resizeRock() {
        document.getElementById('rockimg').style.height =
        (document.body.clientHeight - 100) * 0.9;
      }
    </script>
</head>
<body onload="resizeRock()">
    <img id="rockimg" src="pegoet.png">
</body>

The image should be full height (~90%) when the page loads. But it doesn’t work for me, although I copied everything 1 to 1. What is the reason, what is wrong?

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1 answer(s)

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gracer, 2015-05-02
@Chekhoved

Forgotten units of measurement

function resizeRock() {
    document.getElementById('rockimg').style.height =
        ((document.body.clientHeight - 100) * 0.9)+"px";
}