Sort an array of objects by multiple fields

multisort.js

// ref: http://ituneslp.net/tutorials/itunescontrol

array.sortOn = function() {
  for(var i=0 ; i < arguments.length; i++){
    var field = arguments[i];
    this.sort(function(a, b){
      if(a[field] > b[field]){
        return 1;
      }
      if(a[field] < b[field]){
        return -1;
      }
      return 0;
    });
  }
}