.zellenhg {
	background-image: url(../hg/hg_aussen.gif);
}
.zelleschwarz {
	background-image: url(../hg/hg_schwarz.gif);
}
.zelleblau {
	background-image: url(../hg/hg_blau.gif);
}
.zellegelb {
	background-image: url(../hg/hg_gelb.gif);
}
.zellegruen {
	background-image: url(../hg/hg_gruen.gif);
}
.zellelila {
	background-image: url(../hg/hg_lila.gif);
}
.zellerot {
	background-image: url(../hg/hg_rot.gif);
}