function RandInt(min, max) {
var div = (max - min) + 1
var randNum = Math.random()
for (var i = 0; i <= div - 1; i++) {
if (randNum >= i / div && randNum < (i+1) / div) {
return i + min
}
}
}
var maxAd = 8;
var adArr = new Array(maxAd);
adArr[0] = ' ';
adArr[1] = ' ';
adArr[2] = ' ';
adArr[3] = adArr[2];
adArr[4] = adArr[2];
adArr[5] = adArr[2];
adArr[6] = adArr[2];
adArr[7] = adArr[2];
var currAd = RandInt(0, maxAd - 1);
for (var j = 0; j < maxAd; j++){
if (currAd == j) document.write(adArr[j]);
}