<div class="Editable Textarea">
<h1>This is a fully editable textarea which auto highlights syntax.</h1>
<p>Type or paste any code in here...</p>
<div>
<?php
var simple = "coding";
?>
<script>
with = "Tab or double space functionality";
</script>
I don't know why I have this on my blog, But I liked this.
Code Reference: Ashley Ktorou