Recursively Combine Arrays in jquery

gistfile1.txt

recursiveSearch = function (text, depth ) {
    var a = [ ['1','2','3'], ['a','b','c'] ];

    var results = [""]; // start with the empty string,
    for (var i=0; i<a.length; i++) { // and repeatedly
            var ai = a[i],
                l = ai.length;
        results = $.map(results, function(r) { // make result a new array of
            var ns = []; // new combinations of
            for (var j=0; j<l; j++) // each of the letters in ai
                ns[j] = r + ai[j]; // and the old results
            return ns;
        }); // using the odds of jQuery.map with returned arrays
    }
    return results;
}