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+<!DOCTYPE html>
+<html>
+<body>
+
+<h2>JavaScript Regular Expressions</h2>
+
+<p>Replace "microsoft" with "Google" in the paragraph below:</p>
+
+<button onclick="myFunction()">Try it</button>
+
+<p id="demo">Please visit Microsoft and Microsoft!</p>
+
+<script>
+function myFunction() {
+  var str = document.getElementById("demo").innerHTML; 
+  var txt = str.replace(/microsoft/i,"Google");
+  document.getElementById("demo").innerHTML = txt;
+}
+</script>
+
+</body>
+</html>
+
+
