tm1_off = new Image();
            tm2_off = new Image();
            tm3_off = new Image();
            tm4_off = new Image();
            tm5_off = new Image();
            tm6_off = new Image();
            tm7_off = new Image();
            tm8_off = new Image();
            tm1_on = new Image();
            tm2_on = new Image();
            tm3_on = new Image();
            tm4_on = new Image();
            tm5_on = new Image();
            tm6_on = new Image();
            tm7_on = new Image();
            tm8_on = new Image();
            
            tm1_on.src = "../img/tm_start_on.gif";
            tm2_on.src = "../img/tm_utb_on.gif";
            tm3_on.src = "../img/tm_foretag_on.gif";
            tm4_on.src = "../img/tm_boka_on.gif";
            tm5_on.src = "../img/tm_mats_on.gif";
            tm7_on.src = "../img/tm_info_on.gif";
            tm6_on.src = "../img/tm_roster_on.gif";
            tm8_on.src = "../img/tm_kontakt_on.gif";
            tm1_off.src = "../img/tmu1_off.gif";
            tm2_off.src = "../img/tmu2_off.gif";
            tm3_off.src = "../img/tmu3_off.gif";
            tm4_off.src = "../img/tmu4_off.gif";
            tm5_off.src = "../img/tmu5_off.gif";
            tm7_off.src = "../img/tmu7_off.gif";
            tm6_off.src = "../img/tmu6_off.gif";
            tm8_off.src = "../img/tmu8_off.gif";
            
            function bildbyte(bildnamn,nysrc) {
                var lank = bildnamn+"_"+nysrc+".src"
                document.images[bildnamn].src = eval(lank);
            }