<?php
class CommonData {
	
	static private $instance = null;
	
	static public function getInstance() {
		if ( self::$instance == null )
			self::$instance = new CommonData();
		return self::$instance;
	}
	
	private $currentMonitor;
	public function setCurrentMonitor($curr_mon) {
		$this->currentMonitor = $curr_mon;
	}
	public function getCurrentMonitor() {
		return $this->currentMonitor;
	}
}