Passing variables in links

[ninedoors]

I have a calendar setup inside an iframe.  I would like to add links for the user to be able to move to the next and previous months.  I am having trouble passing the variables to the next page when they are activated.  I am using Kevin Devens calendar located here:http://keithdevens.com/software/php_calendar

 

Here is the code I am trying to use:

 

This code is inside the page /BigC/content/iframe.php

 

<?php
include 'calendar.php';

if (!empty($id))	{
	$time = strtotime($id . 'month', $month); 
	}
	else	{
		$time = time();
		} 
$today = date('j',$time);
$newmonth = date('Y-m-d', $time);
$pn = array('«'=>'/BigC/content/iframe.php?id=-1;month=$newmonth', '»'=>'/BigC/content/iframe.php?id=1;month=$newmonth');
$days = array($today=>array(NULL,NULL,'<span style="color: darkred; font-weight: bold; text-decoration: blink;">'.$today.'</span>')); 
echo generate_calendar(date('Y', $time), date('n', $time), $days, 3, NULL, 0, $pn); 

?>

 

I know the code isn't right but I am having trouble figuring out where to go next to fix it.  I am not seeing a work around that I can use.

 

Any help would be great.

 

Forgot to say that I am new to using variables instead a url, I have only done it a few time and those times were basically through cut and paste code.  If anyone knows a good spot to read up on it I would appreciate that too.