How to choose a set of unique random numbers (no duplicates) using the jQuery.inArray method?

Question

This is a Javascript / jQuery question:

I\'m trying to generate six unique random numbers between 1 and 21 (no duplicates), using the jQuery.inArray

Answer 1

// Initial number
var x = Math.ceil(Math.random() * TotalLogos);

// Keep searching until a unique number is found
while ($.inArray(x, r) > -1) {
    x = Math.ceil(Math.random() * TotalLogos);
}

// If it's unique, set it
r[t] = x;