<!DOCTYPE html>
<html>
<body>
<p>Click the button to replace "blue" with "red" in the paragraph below:</p>
<p id="demo">Mr Blue has a blue house and a blue car.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var str = document.getElementById("demo").innerHTML;
var res = str.replace(/blue/gi, "red");
document.getElementById("demo").innerHTML = res;
}
</script>
</body>
</html>
<html>
<body>
<p>Click the button to replace "blue" with "red" in the paragraph below:</p>
<p id="demo">Mr Blue has a blue house and a blue car.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var str = document.getElementById("demo").innerHTML;
var res = str.replace(/blue/gi, "red");
document.getElementById("demo").innerHTML = res;
}
</script>
</body>
</html>
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