// Bilder laden: Instanzen der Klasse Image erstellen
// --------------------------------------------------
menuebuttonhom = new Image();    menuebuttonhom.src    = "images/frame-links-button-hom.gif";
menuebuttonhom_on = new Image(); menuebuttonhom_on.src = "images/frame-links-button-hom-on.gif";

menuebuttonakt = new Image();    menuebuttonakt.src    = "images/frame-links-button-akt.gif";
menuebuttonakt_on = new Image(); menuebuttonakt_on.src = "images/frame-links-button-akt-on.gif";

menuebuttonnwl = new Image();    menuebuttonnwl.src    = "images/frame-links-button-nwl.gif";
menuebuttonnwl_on = new Image(); menuebuttonnwl_on.src = "images/frame-links-button-nwl-on.gif";

menuebuttonmag = new Image();    menuebuttonmag.src    = "images/frame-links-button-mag.gif";
menuebuttonmag_on = new Image(); menuebuttonmag_on.src = "images/frame-links-button-mag-on.gif";

menuebuttonmit = new Image();    menuebuttonmit.src    = "images/frame-links-button-mit.gif";
menuebuttonmit_on = new Image(); menuebuttonmit_on.src = "images/frame-links-button-mit-on.gif";

//menuebuttonbis = new Image();    menuebuttonbis.src    = "images/frame-links-button-bis.gif";
//menuebuttonbis_on = new Image(); menuebuttonbis_on.src = "images/frame-links-button-bis-on.gif";

//menuebuttonpre = new Image();    menuebuttonpre.src    = "images/frame-links-button-pre.gif";
//menuebuttonpre_on = new Image(); menuebuttonpre_on.src = "images/frame-links-button-pre-on.gif";

menuebuttonlin = new Image();    menuebuttonlin.src    = "images/frame-links-button-lin.gif";
menuebuttonlin_on = new Image(); menuebuttonlin_on.src = "images/frame-links-button-lin-on.gif";

menuebuttonkon = new Image();    menuebuttonkon.src    = "images/frame-links-button-kon.gif";
menuebuttonkon_on = new Image(); menuebuttonkon_on.src = "images/frame-links-button-kon-on.gif";

menuebuttonimp = new Image();    menuebuttonimp.src    = "images/frame-links-button-imp.gif";
menuebuttonimp_on = new Image(); menuebuttonimp_on.src = "images/frame-links-button-imp-on.gif";

// Funktionen: // -----------
function on(name) {document[name].src = eval (name + "_on.src");}
function off(name) {document[name].src = eval (name + ".src");}