if (document.images) {

img1on = new Image();    img1on.src = "bild/home_on.gif";

img2on = new Image();    img2on.src = "bild/rund_on.gif";
img2ion = new Image();    img2ion.src = "de/bild/rund_on.gif";
 img21on = new Image();	img21on.src = "bild/rund_erdgas_on.gif";
 img22on = new Image();	img22on.src = "bild/rund_bezug_on.gif";
 img23on = new Image();	img23on.src = "bild/rund_preis_on.gif";
 img24on = new Image();	img24on.src = "bild/rund_umwelt_on.gif";
 img25on = new Image();	img25on.src = "bild/rund_riech_on.gif";
 img26on = new Image();	img26on.src = "bild/rund_verhalten_on.gif";
 img27on = new Image();	img27on.src = "bild/rund_vors_on.gif";
 img28on = new Image();	img28on.src = "bild/rund_sich_on.gif";

img3on = new Image();    img3on.src = "bild/betreiber_on.gif";
img3ion = new Image();    img3ion.src = "de/bild/betreiber_on.gif";
 img31on = new Image();	img31on.src = "bild/betreiber_gas_on.gif";
 img32on = new Image();	img32on.src = "bild/betreiber_verkehr_on.gif";
 img33on = new Image();	img33on.src = "bild/betreiber_mietrecht_on.gif";
 img34on = new Image();	img34on.src = "bild/betreiber_heizung_on.gif";
 img35on = new Image();	img35on.src = "bild/betreiber_din_on.gif";
 img36on = new Image();	img36on.src = "bild/betreiber_hersteller_on.gif";
 img37on = new Image();	img37on.src = "bild/betreiber_bimschv_on.gif";

img4on = new Image();    img4on.src = "bild/check_on.gif";
img4ion = new Image();    img4ion.src = "de/bild/check_on.gif";
 img41on = new Image();	img41on.src = "bild/check_erdgas_on.gif";
 img42on = new Image();	img42on.src = "bild/check_pruefver_on.gif";
 img43on = new Image();	img43on.src = "bild/check_gassitec_on.gif";
 img44on = new Image();	img44on.src = "bild/check_leistung_on.gif";
 img45on = new Image();	img45on.src = "bild/check_pruefint_on.gif";
 img46on = new Image();	img46on.src = "bild/check_leck_on.gif";

img5on = new Image();    img5on.src = "bild/wartung_on.gif";
img5ion = new Image();    img5ion.src = "de/bild/wartung_on.gif";
 img51on = new Image();	img51on.src = "bild/wartung_cliste_on.gif";
 img52on = new Image();	img52on.src = "bild/wartung_vertrag_on.gif";

img6on = new Image();    img6on.src = "bild/gasrohr_on.gif";
img6ion = new Image();    img6ion.src = "de/bild/gasrohr_on.gif";
 img61on = new Image();	img61on.src = "bild/gasrohr_hinterg_on.gif";
 img62on = new Image();	img62on.src = "bild/gasrohr_leitung_on.gif";
img63on = new Image();	img63on.src = "bild/gasrohr_innen_on.gif";

img7on = new Image();    img7on.src = "bild/manipulation_on.gif";
img7ion = new Image();    img7ion.src = "de/bild/manipulation_on.gif";
 img71on = new Image();	img71on.src = "bild/manipulation_hinterg_on.gif";
 img72on = new Image();	img72on.src = "bild/manipulation_praev_on.gif";

// img8on = new Image();    img8on.src = "bild/email_on.gif";

img9on = new Image();    img9on.src = "bild/kontakt_on.gif";
img9ion = new Image();    img9ion.src = "de/bild/kontakt_on.gif";
 img91on = new Image();    img91on.src = "bild/butt_vor_on.gif";
 img92on = new Image();    img92on.src = "bild/butt_zu_on.gif";

img10on = new Image();   img10on.src = "bild/partner_on.gif";
img10ion = new Image();   img10ion.src = "de/bild/partner_on.gif";

img100on = new Image();   img100on.src = "bild/impressum_on.gif";
img100ion = new Image();   img100ion.src = "de/bild/impressum_on.gif";


img1off = new Image();    img1off.src = "bild/home_off.gif";

img2off = new Image();    img2off.src = "bild/rund_off.gif";
img2ioff = new Image();    img2ioff.src = "de/bild/rund_off.gif";
 img21off = new Image();	img21off.src = "bild/rund_erdgas_off.gif";
 img22off = new Image();	img22off.src = "bild/rund_bezug_off.gif";
 img23off = new Image();	img23off.src = "bild/rund_preis_off.gif";
 img24off = new Image();	img24off.src = "bild/rund_umwelt_off.gif";
 img25off = new Image();	img25off.src = "bild/rund_riech_off.gif";
 img26off = new Image();	img26off.src = "bild/rund_verhalten_off.gif";
 img27off = new Image();	img27off.src = "bild/rund_vors_off.gif";
 img28off = new Image();	img28off.src = "bild/rund_sich_off.gif";

img3off = new Image();    img3off.src = "bild/betreiber_off.gif";
img3ioff = new Image();    img3ioff.src = "de/bild/betreiber_off.gif";
 img31off = new Image();	img31off.src = "bild/betreiber_gas_off.gif";
 img32off = new Image();	img32off.src = "bild/betreiber_verkehr_off.gif";
 img33off = new Image();	img33off.src = "bild/betreiber_mietrecht_off.gif";
 img34off = new Image();	img34off.src = "bild/betreiber_heizung_off.gif";
 img35off = new Image();	img35off.src = "bild/betreiber_din_off.gif";
 img36off = new Image();	img36off.src = "bild/betreiber_hersteller_off.gif";
 img37off = new Image();	img37off.src = "bild/betreiber_bimschv_off.gif";

img4off = new Image();    img4off.src = "bild/check_off.gif";
img4ioff = new Image();    img4ioff.src = "de/bild/check_off.gif";
 img41off = new Image();	img41off.src = "bild/check_erdgas_off.gif";
 img42off = new Image();	img42off.src = "bild/check_pruefver_off.gif";
 img43off = new Image();	img43off.src = "bild/check_gassitec_off.gif";
 img44off = new Image();	img44off.src = "bild/check_leistung_off.gif";
 img45off = new Image();	img45off.src = "bild/check_pruefint_off.gif";
 img46off = new Image();	img46off.src = "bild/check_leck_off.gif";

img5off = new Image();    img5off.src = "bild/wartung_off.gif";
img5ioff = new Image();    img5ioff.src = "de/bild/wartung_off.gif";
 img51off = new Image();	img51off.src = "bild/wartung_cliste_off.gif";
 img52off = new Image();	img52off.src = "bild/wartung_vertrag_off.gif";

img6off = new Image();    img6off.src = "bild/gasrohr_off.gif";
img6ioff = new Image();    img6ioff.src = "de/bild/gasrohr_off.gif";
 img61off = new Image();	img61off.src = "bild/gasrohr_hinterg_off.gif";
 img62off = new Image();	img62off.src = "bild/gasrohr_leitung_off.gif";
 img63off = new Image();	img63off.src = "bild/gasrohr_innen_off.gif";

img7off = new Image();    img7off.src = "bild/manipulation_off.gif";
img7ioff = new Image();    img7ioff.src = "de/bild/manipulation_off.gif";
 img71off = new Image();	img71off.src = "bild/manipulation_hinterg_off.gif";
 img72off = new Image();	img72off.src = "bild/manipulation_praev_off.gif";

// img8off = new Image();    img8off.src = "bild/email_off.gif";

img9off = new Image();    img9off.src = "bild/kontakt_off.gif";
img9ioff = new Image();    img9ioff.src = "de/bild/kontakt_off.gif";
 img91off = new Image();    img91off.src = "bild/butt_vor_off.gif";
 img92off = new Image();    img92off.src = "bild/butt_zu_off.gif";

img10off = new Image();   img10off.src = "bild/partner_off.gif";
img10ioff = new Image();   img10ioff.src = "de/bild/partner_off.gif";

img100off = new Image();   img100off.src = "bild/impressum_off.gif";
img100ioff = new Image();   img100ioff.src = "de/bild/impressum_off.gif";

}

    function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");
            }
    }

    function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");
            }
    }