Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<body>

<a name="html">HTML Tutorial</a><br>
<a name="css">CSS Tutorial</a><br>
<a name="xml">XML Tutorial</a><br>

<p>Click the button to display the number of anchors in the document.</p>

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

<p id="demo"></p>

<script>
function myFunction() {
    var x = document.anchors.length;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>