How to pass values with data.php file

[bandy]

Hi,
I am using flash in application, using this stuff in head ,

<script type="text/javascript" src="js/swfobject.js"></script>
<script type="text/javascript">
 	
 	function notEmpty()
	{
		var act = document.getElementById('var1');  
		var inact = document.getElementById('var2');
		var dis = document.getElementById('var3');
		swfobject.embedSWF(
		"open-flash-chart.swf", "my_chart", "500", "250",
		"9.0.0", "expressInstall.swf",
		{"data-file":"data.php?p="+act.value+"&amp;q="+inact.value+"&amp;r="+dis.value}
		);
	}
</script>

calling this function on body load event.
There is a data.php file which contains all the parameters to display the flash chart.
Now problem is that>>>
I am accessing these three variables in data.php as $_GET['p']; $_GET['q']; $_GET['r'];
but not able to get these values in data.php.
What can i do in such situation, am i going right or wrong.
can somebody tell me better solution please?
Thank you in advance.