<!DOCTYPE html>
<html>
<body>
<p>Replace "microsoft" with "W3Schools" in the paragraph below:</p>
<button onclick="myFunction()">Try it</button>
<p id="demo">Please visit Microsoft!</p>
<script>
function myFunction() {
var str = document.getElementById("demo").innerHTML;
var txt = str.replace(/microsoft/i,"W3Schools");
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>