Bubble Sort in javascript

bubblesort.js

var bubbleSort = function(array) {
  if (array.constructor !== Array) throw 'not an Array';
  do {
    var somethingWasSwapped = false;
    // go through and...
    for(var i = 0, ii = array.length; i < ii; i++) {
      // if necessary
      if (array[i] > array[i + 1]) {
        // swap the two indices
        somethingWasSwapped = true;
        var temp = array[i+1];
        array[i+1] = array[i];
        array[i] = temp;
      }
    }
  } while(somethingWasSwapped);
  return array;
};