Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("a[target='_blank']").hide();
    });
});
</script>
</head>
<body>

<h2>This is a heading</h2>

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<p><a href="../html/index.html" target="_blank">HTML Tutorial</a></p>
<p><a href="../css/index.html">CSS Tutorial</a></p>

<button>Click me</button>

</body>
</html>