allKeys listOfKeys will contain the string 'Connery,York,Douglas'.
var badSciFi = new Hash();
var listOfKeys = '';
badSciFi.setItem("Connery", "Zardoz");
badSciFi.setItem("York", "Logan's Run");
badSciFi.setItem("Douglas", "Saturn 3");
listOfKeys = badSciFi.allKeys();