if (document.images) {           // Active Images
	sa_nchecon = new Image();
	sa_nchecon.src = "/img/sa_nchec2.gif";
	sa_nchecoff = new Image();
	sa_nchecoff.src = "/img/sa_nchec1.gif";

	sa_nstudon = new Image();
	sa_nstudon.src = "/img/sa_nstud2.gif";
	sa_nstudoff = new Image();
	sa_nstudoff.src = "/img/sa_nstud1.gif";
	
	sa_nbussvcson = new Image();
	sa_nbussvcson.src = "/img/sa_nbussvcs2.gif";
	sa_nbussvcsoff = new Image();
	sa_nbussvcsoff.src = "/img/sa_nbussvcs1.gif";

	sa_ndepoon = new Image();
	sa_ndepoon.src = "/img/sa_ndepo2.gif";
	sa_ndepooff = new Image();
	sa_ndepooff.src = "/img/sa_ndepo1.gif";

	sa_ndiscon = new Image();
	sa_ndiscon.src = "/img/sa_ndisc2.gif";
	sa_ndiscoff = new Image();
	sa_ndiscoff.src = "/img/sa_ndisc1.gif";

	sa_nelecon = new Image();
	sa_nelecon.src = "/img/sa_nelec2.gif";
	sa_nelecoff = new Image();
	sa_nelecoff.src = "/img/sa_nelec1.gif";

	sa_nrateon = new Image();
	sa_nrateon.src = "/img/sa_nrate2.gif";
	sa_nrateoff = new Image();
	sa_nrateoff.src = "/img/sa_nrate1.gif";

}