[рони]

ytil,
для новых браузеров

<script>
function makeRand(num) {
    var usedNumbers = [];
    function f() {
        if(usedNumbers.length == num) usedNumbers = [];
        var i = Math.floor(Math.random() * num) + 1;
        return usedNumbers.includes(i) ? f() : (usedNumbers.push(i),i)

    }
    return f;
}

var x = makeRand(100);

document.write(x()+"<br>");
document.write(x()+"<br>");
document.write(x()+"<br>");
  </script>