Random generate three integer values and check if they are unique

First, I am generating random integer values to get some values to check.

var A1, B2, C3:int;
A1 = Math.random() * 100 + 1;
B2 = Math.random() * 100 + 1;
C3 = Math.random() * 100 + 1;

Then I want to check if all the variables are unique from each other.

if (!(A1 == B2 || A1 == C3 || B2 == C3)){
        unique = true;
}else{ // Not unique
}

If the variables are not unique to each other, I want to keep only the value for A1, and then change the two other variables B2 and C3 and then again check if they are unique.

}else{ // Not unique
            if (unique = false){
                do{
                    B2 = Math.random() * A1 + 1;
                    C3 = Math.random() * A1 + 1;

                    if (!(A1 == B2 || A1 == C3 || B2 == C3)){
                        unique = true;                  
                }while (unique = true)
    }
            trace("Not unique");
    }

My problem is that I cannot get three unique values, and any help on how I can solve this is highly appreciated.