var rand1 = 0;
var useRand = 0;

images = new Array;
images[1] = new Image();
images[1].src = "RandomImages/Banane.gif";
images[2] = new Image();
images[2].src = "RandomImages/Carote.gif";
images[3] = new Image();
images[3].src = "RandomImages/cavolo.gif";
images[4] = new Image();
images[4].src = "RandomImages/Albicocche.gif";
images[5] = new Image();
images[5].src = "RandomImages/Limoni.gif";
images[6] = new Image();
images[6].src = "RandomImages/Uva.gif";
images[7] = new Image();
images[7].src = "RandomImages/Mele.gif";
images[8] = new Image();
images[8].src = "RandomImages/Asparagi.gif";
images[9] = new Image();
images[9].src = "RandomImages/Mandarini.gif";
images[10] = new Image();
images[10].src = "RandomImages/Arance.gif";
images[11] = new Image();
images[11].src = "RandomImages/Pesche.gif";
images[12] = new Image();
images[12].src = "RandomImages/Patate.gif";
images[13] = new Image();
images[13].src = "RandomImages/Lattuga.gif";
images[14] = new Image();
images[14].src = "RandomImages/Angurie.gif";
images[15] = new Image();
images[15].src = "RandomImages/Fragole.gif";

function swapPic() {
var imgnum = images.length - 1;
do {
var randnum = Math.random();
rand1 = Math.round((imgnum - 1) * randnum) + 1;
} while (rand1 == useRand);
useRand = rand1;
document.randimg.src = images[useRand].src;
}