<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>
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</html>