how to route to an action with ajax.request

Hi, so I am attempting to gather a number of onclicks from the user
with a javascript function and store them in an array. The problem is
that I now want to be able to take that array and covnert it into ruby
so that I can perform further functions on it and save it in the
database. This is the function that I have so far: I am using JSON
and trying to pass the array in an ajax.request call but it is not
routing to the /appointments/array/ action. Is this the right way to
go about it?

        function test()
        {
              for(i=1;i<22;i++){
                    if (document.getElementById(i+'d').className ==
"selected"){
                        myArray.push(i);
                    }
                }

                new Ajax.Request('/appointments/array/',
{method:'post',postBody:'data='+myArray.toJSON});
        }