A Simple "here or not here" application? (intranet)

hi,

I need to make simple intra net style application,
that would display wether or not an employee is on the location or not,

an exp:
a customer calls in asking for Joe Blow,
the receipionist can simple look at the intranet home page,
and it will have a green light or a red light for that employee,
for wether the employee is there or not,

and the intranet would be controlled by a single admin

any ideas how I could acommplish this using flash and PHP?
a very quick Demo of the flash is HERE
and im just using this for AS code:

var lightBulb = true;
btn1.onRelease = function(){
	if(lightBulb = true){
		gotoAndStop("nothere")
		lightBulb = false;
	}
};

is there any way the admin, using the flash tool,
would be able to set the employee’s status,
send the status info to a php script,
which would then be read by the end-user SWF.
displaying what the admin has set the status to?

or any other easy way would work to :wink: