Javascript Prompts

Prompts are those annoying little text boxes that pop up on page load, and expect you to type in them. This one asks the user their name and then greets them personally. If no name is given it says 'Hello stranger' instead.
Copy and paste into the HEAD of your page.

<script type="text/javascript"> var uname = prompt("What's your name?", ""); if (uname == "" || uname == null) { var uname = "stranger"; } document.writeln("Hello "+uname); </script>