Simple Tagboard Form

I'm wanting to make a simple tag board form that takes input from a user and displays it in a text box or i-frame. I haven't learned the concept of makeing a simple input form so i have no clue how to do this
Is there some easy code i could understand that you could post?

For example

Name.........
Message........
Text Area........(Where the message and name are displayed once submit button is pressed)
(Submit Button)

Is it possible to make the message and name display in a text area or does it have to be an i-frame??

<script language="JavaScript" type="text/JavaScript">

function add2textarea(form) {
if (form.Name.value && form.Message.value) {
form.Result.value = form.Name.value + "\n\n" + form.Message.value;
}
return true;
}

</script>
...
<form>
<input type="text" name="Name" onBlur="add2textarea(this.form);">
<br>
<input type="text" name="Message" onBlur="add2textarea(this.form);">
<p>
<textarea cols="65" rows="10" name="Result">
</form>