Tryit Editor v2.9

Edit This Code:

<!DOCTYPE html>
<html>
<body>

<p id="demo"></p>

<script>
try {
adddlert("Welcome guest!");
}
catch(err) {
document.getElementById("demo").innerHTML = err.message;
}
</script>

</body>
</html>

<!DOCTYPE html>
<html>
<body>

<p id="demo"></p>

<script>
try {
    adddlert("Welcome guest!");
}
catch(err) {
    document.getElementById("demo").innerHTML = err.message;
}
</script>

</body>
</html>