checking javascript is enabled

Question

I am building a html page. I was to make a quick 1 line test which, if the user has javascript enabled says "javascript on" otherwise says "javascript off" just to let them know.

How can I do this?

Answer 1

<div id="js_onoff">JavaScript off :(</div>
<script>
    document.getElementById("js_onoff").innerHTML = "JavaScript on, yeah! :)";
</script>