Tryit Editor v2.9

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

<img id="myImg" src="w3javascript.gif" width="100" height="132">
<br>

<button type="button" onclick="hideElem()">Hide image</button>
<button type="button" onclick="showElem()">Show image</button>

<script>
function hideElem() {
    document.getElementById("myImg").style.visibility = "hidden"; 
}

function showElem() {
    document.getElementById("myImg").style.visibility = "visible"; 
}
</script>

</body>
</html>