function rollOn(i) {
	s_xxxgif = i.src;
	len = s_xxxgif.length;
	s_yyygif = s_xxxgif.substring(0, len-7);
	r = Math.random();
	if (r > 0.5) {
		s_yyygif += "pnk.gif";
	} else {
		s_yyygif += "grn.gif";
	}
	i.src = s_yyygif;
}

function rollOut(i) {
	s_xxxgif = i.src;
	len = s_xxxgif.length;
	s_yyygif = s_xxxgif.substring(0, len-7);
	s_yyygif += "off.gif";
	i.src = s_yyygif;
}