I think that the problem is @DbColumn will return a Vector and not an Array.

 

Problem resolved :)

 

 

 

var range = @DbColumn("","alle",1);

    function rand(range_from,range_to)
        {
            var r = Math.random();
            r = r * (range_to-range_from) + range_from;
            return Math.round(r);
        }

var result = range[rand(0,range.length-1)];

return result

 

Pozdrawiam Tomek