Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
a[target] {
    background-color: yellow;
}

</style>
</head>
<body>

<p>The CSS selector a[target] makes sure that all links with a target attribute gets a yellow background:</p>

<div id="myDIV">
  <a href="../index.html">w3schools.com</a>
  <a href="http://www.disney.com" target="_blank">disney.com</a>
  <a href="http://www.wikipedia.org" target="_top">wikipedia.org</a>
</div>

<p>Click the button to add a red border to all links in DIV that have a target attribute.</p>

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

<p><strong>Note:</strong> The querySelectorAll() method is not supported in Internet Explorer 8 and earlier versions.</p>

<script>
function myFunction() {
    var x = document.getElementById("myDIV").querySelectorAll("a[target]");
    var i;
    for (i = 0; i < x.length; i++) {
        x[i].style.border = "10px solid red";
    }
}
</script>

</body>
</html>


Result:
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