function preload(pix) {
preld = new Array();
for (i = 0; i < pix.length; i++) {
preld[i] = new Image();
preld[i].src = pix[i];
}
}
function buttonLight(num, imgname) {
imgname.src = preld[num].src;
}
button = new Array();
button[0]  = "buttons/button1a.png";
button[1]  = "buttons/button1b.png";

button[2]  = "buttons/button2a.png";
button[3]  = "buttons/button2b.png";


button[4]  = "buttons/button3a.png";
button[5]  = "buttons/button3b.png";


button[6]  = "buttons/button4a.png";
button[7]  = "buttons/button4b.png";

button[8]  = "buttons/button5a.png";
button[9]  = "buttons/button5b.png";

button[10]  = "buttons/button6a.png";
button[11]  = "buttons/button6b.png";

button[12]  = "buttons/button7a.png";
button[13]  = "buttons/button7b.png";

button[14]  = "buttons/button8a.png";
button[15]  = "buttons/button8b.png";

button[16]  = "buttons/button9a.png";
button[17]  = "buttons/button9b.png";

button[18]  = "buttons/button10a.png";
button[19]  = "buttons/button10b.png";

button[20]  = "buttons/button11a.png";
button[21]  = "buttons/button11b.png";

button[22]  = "buttons/button12a.png";
button[23]  = "buttons/button12b.png";

button[24]  = "buttons/button13a.png";
button[25]  = "buttons/button13b.png";

button[26]  = "buttons/button14a.png";
button[27]  = "buttons/button14b.png";

button[28]  = "buttons/button15a.png";
button[29]  = "buttons/button15b.png";


button[30]  = "buttons/laden1.png";
button[31]  = "buttons/laden2.png";

button[32]  = "buttons/button17a.png";
button[33]  = "buttons/button17b.png";
preload(button);