无法处理PROTOTYPE AJAX响应

{jobs:[{Dater:\"2010-01-01\",INCPU:\"1\"},{Dater:\"2010-01-02\",INCPU:\"2\"}]

new Ajax.Request(\'/HumblFin/Serv\',
onSuccess: function(transport){
        var response = transport.responseText;
        drawChart(response);



function drawChart(response)
    {

        alert(response.jobs.length);
         for (var i = 0; i < response.jobs.length; i++)  { 
             priceData.push([i, response.jobs[i].INCPU]);
             dateData.push(response.jobs[i].Dater);

         }


    }