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/**
 * Simple function that acts like String.join(), except it allows for a custom final joiner. This
 * is helpful in situations where you want to join an array in human readable form, e.g.
 *   var arr = ["one", "two", "three"];
 *   alert(arr.customJoin(", ", " and ")); // alerts "one, two and three"
 */
Array.prototype.customJoin = function(glue, finalGlue)
{
  // if there's at least one element, pop off the LAST item
  var lastItem = null;
  if (this.length > 0)
    lastItem = this.pop();

  // now, if there's still 1 or more items left, join them with the glue
  if (this.length > 0)
  {
    var str = this.join(glue);
    str += finalGlue + lastItem;
  }
  // otherwise there was only one item: just return the string
  else
    str = lastItem;

  return str;
}