<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/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/" target="_blank">HTML Tutorial</a></p>
<p><a href="/css/">CSS Tutorial</a></p>
<button>Click me</button>
</body>
</html>