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_off.src = "img/top_02.gif";
            tm2_off.src = "img/top_03.gif";
            tm3_off.src = "img/top_04.gif";
            tm4_off.src = "img/top_05.gif";
            tm5_off.src = "img/top_06.gif";
            tm6_off.src = "img/top_07.gif";
            tm7_off.src = "img/top_08.gif";
            tm8_off.src = "img/top_09.gif";
            tm1_on.src = "img/top_o_02.gif";
            tm2_on.src = "img/top_o_03.gif";
            tm3_on.src = "img/top_o_04.gif";
            tm4_on.src = "img/top_o_05.gif";
            tm5_on.src = "img/top_o_06.gif";
            tm6_on.src = "img/top_o_07.gif";
            tm7_on.src = "img/top_o_08.gif";
            tm8_on.src = "img/top_o_09.gif";
            
            function bildbyte(bildnamn,nysrc) {
                var lank = bildnamn+"_"+nysrc+".src"
                document.images[bildnamn].src = eval(lank);
            }