function goRand() {
var num = 6;  // количество картинок
myImages = new Array();
myImages[0] = "/files/clayblock/banners/file1.gif";
myImages[1] = "/files/clayblock/banners/file2.gif";
myImages[2] = "/files/clayblock/banners/file3.gif";
myImages[3] = "/files/clayblock/banners/file4.gif";
myImages[4] = "/files/clayblock/banners/file5.gif";
myImages[5] = "/files/clayblock/banners/file6.gif";
rand = Math.floor(Math.random() * num);
current_image = myImages[rand];
}