function Cautare_binara(arr,target){

    arr = [1, 2, 3, 4, 5, 16, 7, 6, 9, 10, 11, 12, 8, 14, 15];

    target = 6;

    var left = 0;

    var right = arr.length;

    while (left < right)
    {

    var mid = Math.floor((left + right) / 2);

    if (arr[mid] == target)
    {
        return mid;
    }

   else if (arr[mid] > target)
    {
      right = mid - 1;
    }
    else if (arr[mid] < target)
    {
        left = mid + 1;
    }
    }
}

console.log(Cautare_binara())