arkitrave

    // Gets the location in a grid of objects by numbered row and lettered column
    // Example: 5C is the 5th row, 3rd column
getGridLocation = function($el) {
  var $items = $el.find('.item:visible'),
    index = $items.index($el),
    lefts = [],
    tops = [];

  $items.each(function() {
    var $item = $(this),

arkitrave

Date.prototype.beginningOfWeek = function () {
  return new Date(this - ((this.getDay() - (arguments[0] || 0)) * 86400000));
}