<!DOCTYPE html>
<html>
<body>
<a id="myAnchor" href="http://www.microsoft.com">Microsoft</a>
<button onclick="myFunction()">Change link</button>
<script>
function myFunction() {
document.getElementById("myAnchor").innerHTML = "W3Schools";
document.getElementById("myAnchor").href = "http://www.w3schools.com";
document.getElementById("myAnchor").target = "_blank";
}
</script>
</body>
</html>