function newImage(arg) {
rslt = new Image();
rslt.src = arg;
return rslt;
}

menu1_over = newImage('img/home_1.gif');
menu1_out = newImage('img/home_1.gif');
menu2_over = newImage('img/leistung_2.gif');
menu2_out = newImage('img/leistung_1.gif');
menu3_over = newImage('img/werk_2.gif');
menu3_out = newImage('img/werk_1.gif');
menu4_over = newImage('img/referenz_2.gif');
menu4_out = newImage('img/referenz_1.gif');
menu5_over = newImage('img/profil_2.gif');
menu5_out = newImage('img/profil_1.gif');
menu6_over = newImage('img/schulung_2.gif');
menu6_out = newImage('img/schulung_1.gif');
menu7_over = newImage('img/kontakt_2.gif');
menu7_out = newImage('img/kontakt_1.gif');

portrait_over = newImage('img/portrait_1.gif');
portrait_out = newImage('img/portrait_2.gif');
weiterbildung_over = newImage('img/weiterbildung_1.gif');
weiterbildung_out = newImage('img/weiterbildung_2.gif');

kurse1_over = newImage('img/kurse_1_1.gif');
kurse1_out = newImage('img/kurse_1_2.gif');
kurse2_over = newImage('img/kurse_2_1.gif');
kurse2_out = newImage('img/kurse_2_2.gif');

function bOver(img) {
document[img].src = eval(img +"_over.src");
}

function bOut(img) {
document[img].src = eval(img +"_out.src");
}

function bActiv(img) {
document[img].src = eval(img +"b_out.src");
}