// This will return the smallest commmon multiple of two numbers.
function smallMultiple(a, b, exclude) {
    var iterate = 1;
    while (true) {
        if (a * iterate % b === 0 && a * iterate != exclude) {
            return a * iterate;
        } else {
            console.log(iterate);
            iterate++;
        }
    }
}

function smallestCommons(arr) {
    // creating an array containing all the numbers that need to be checked against.
    var range = [];
    for (var i = 1; i < arr[1] + 1; i++) {
        range.push(i);
    }

    // sorting array in descending order.
    range.sort(function(a,b) {
        return b - a;
    });

    // finding a multiple of the first two numbers and checking it against
    // the next numnbers. Continuing until a multiple is found that matches
    // all of the numbers in range.
    var noCheck = 0;
    while (true) {
        var check = smallMultiple(range[0], range[1], noCheck);

        for (var n = 2; n < range.length; n ++) {
            if (check % range[n] === 0 && n == range.length -1) {
                console.log(check);
                return check;
            } else if (check % range[n] !== 0) {
                noCheck = check;
                break;
            }
        }
    }
}


smallestCommons([1,5]);