Create a method (**JS**: function) `every` which returns every nth element of an array.
### Usage
With no arguments, `array.every` it returns every element of the array.  
With one argument, `array.every(interval)` it returns every `interval`th element.  
With two arguments, `array.every(interval, start_index)` it returns every `interval`th element starting at index `start_index` 
**Note**: due to fact JS translation ask for a function instead of an Array method the above uses will be :
```
javascript:                          ruby:
every(array)                         array.every
every(array, interval)               array.every(interval)
every(array, interval, start_index)  array.every(interval, start_index)
```
### Examples
### Notes
Test cases:  
`interval` will always be a positive integer (but may be larger than the size of the array).  
`start_index` will always be within the bounds of the array.  
Once you have completed this kata, try the **advanced version** (http://www.codewars.com/kata/every-nth-array-element-advanced) which allows negative intervals and unbounded start\_indexes 
### Translator notes
Ruby is the original language for this kata.
def every(array, interval = 1, start_index = 0):
    arr = []
    counter = 0
    
    for i in range(start_index, len(array)):
        if counter == interval:
            arr.append(array[i])
            counter = 0
        elif i == start_index:
            arr.append(array[start_index])
        counter += 1
        
    return arr
            

def every(array, interval = 1, start_index = 0):
    arr = []
    counter = 0
    
    for i in range(start_index, len(array)):
        if counter == interval:
            arr.append(array[i])
            counter = 0
        elif i == start_index:
            arr.append(array[start_index])
        counter += 1
        
    return arr
            
