Run Javascript Once

Ok. I did a search to find any easy solutions but I haven't found any.

I am a n00b in javascript so please bear with me. I know what needs to be done though but I don't know how to do it.

I want to run this script once only per day.

<script src="example.js" language="javascript"></script>

Code (markup):

I know I have to use cookies... something along the lines of:
http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_22775587.html
http://www.weberdev.com/get_example-4280.html

But I don't know how to implement this run once function. I don't know where to put the code in the html or what to put in the html and what to put in the separate javascript cookie file...

Please help? Thanks!

 

<?php
if(!isset($_COOKIE['coockieName']))
{
	$expire=time()+60*60*24;
	setcookie("coockieName", "value", $expire);
	echo "<script src=\"example.js\" language=\"javascript\"></script>";
}
?>

PHP:

 

XDMCoder you are a genious. Rep given for being SOOOO helpful!

This is a much easier solution!

 

You'r welcome