response type for $.jsonp

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JSON

JSONP

I am using following link to make jsonp call https://raw.github.com/betamax/getImageData/master/jquery.getimagedata.js[^]

My jsonp call

$.jsonp({
                   //async: true,
                   //crossDomain: true,
                   type: 'GET',
                   timeout: 10000,
                   url: 'http://sys108/vbr/Handler.ashx?imgURL=' + encodeURIComponent(imageURL) + '&type=crossDomainImage',
                   dataType: 'jsonp',
                   contentType: "application/json; charset=utf-8",
                   success: function (data) {
                       console.log(data.ImageData);

                   },
                   error: function (data) {
                       console.log('error');
                   }
               });

My response method

string imgData= processCrossDomainImage("");
context.Response.ContentType = "text/javascript";
string strJson = "{  \"ImageData\" : \"" + imgData + "\" }";
            //if (context.Request.QueryString["callback"] != null)
            //{
            //    strJson = context.Request.QueryString["callback"] + "(" + strJson + ")";
            //}

            context.Response.Write(strJson);

Above code gives me error "Uncaught syntax error Unexpected token :
My response looks like

{  "ImageData" : "/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAICAgICAQICAgIDAgIDAwYEAwMDAwcFBQQGCAcJCAgHCAgJCg0LCQoMCggICw8SPzI5+pJ/DAr8zxPHfFuPrKdXH1XZp6TaV+mkWl+HkfT08nwGGhpRjrpblW3XW1/L/hj8z/AA/qi634L03VAArXMCs6jorY5Faxb1s2k9F5JdvmdGEwFDLqXsqXXVt7vt919A5AA6Y7UUi/6tfpS1+yHcFFFFAH/2Q==" }

Not sure but i am doing something wrong with response settings.Please help.