class mTimer
{
	var $pTime;
	function getMyTime(){
	   list($usec, $sec) = explode(" ", microtime());
	   return ((float)$usec + (float)$sec);
	}
	function getStop(){
		return printf ("%f",$this->getMyTime() - $this->pTime);
	}
	function mTimer(){
		$this->pTime = $this->getMyTime();
	}
	function commentTime($msg){
		echo "<!-- $msg : ";
		$this->getStop();
		echo "-->\n";
	}
}