code: function(o) {
  		var type = ({}).toString.call(o).match(this._typeexp)[1].toLowerCase();
  		if (type === "domwindow" && String(typeof o) === "undefined") {
  			type = "undefined"; // some kind of degenerate bug in Safari on iPad
  		}
  		return type;
  	}
docs: Get type of argument. Note that response may differ between user agents.
  @see  http://javascriptweblog.wordpress.com/2011/08/08/fixing-the-javascript-typeof-operator
  @param {object} o
  @returns {String}