var uniquer = function() {

	var currentSets = [],
		addToSet = function (newUnique) {
			for (var i=0; i < currentSets.length; i++) {
				if (currentSets[i] == newUnique) {
					return false;
				}
			}
			currentSets.push(newUnique);
			return true;
		},
		uniqueMaker = function (passedLength) {
			while (true) {
				var newUnique = Math.floor( Math.random() * 99999 );
				if (addToSet(newUnique)) {
					return newUnique;
				}
			}
		};

	return {
		getCurrent : function () {
			return currentSets.slice(0);
		},
		create : function () {
			return uniqueMaker();
		}
	};
};
var myUniquer = uniquer();

console.log( myUniquer.create(), myUniquer.create(), myUniquer.create() );