var GetRandomElement = function (array, start, length){ 
if (start === undefined) { 
start = 0; 
} 
if (length === undefined) { 
length = _AN_Read_length('length', array); 
} 
var randomIndex = start + Math.floor(Math.random() * length); 
return (array[randomIndex] === undefined)? null : array[randomIndex]; 
} 
; 
module.exports = GetRandomElement;