Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<img id="myImg" src="compman.gif" width="107" height="98">

<p>Click the button to change the height and width of the image to 300px.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
    document.getElementById("myImg").height = "300";
    document.getElementById("myImg").width = "300";
}
</script>

</body>
</html>