[Lemme]

Array.prototype.unique = function() {
	return this.filter(function(value, index, _this) {
    	return _this.indexOf(value) === index;
    });
}

alert([1,2,3,3,3,4,5,6,7,7,8,3,4,5,6,1,4,5,8,9,3,2, 'q', 'q', 'aaaa'].unique());