According network capture, The request body is : e=zzz%40xxx.com&t=1&x=0&y=0&w=760 The response body is an png image. -- View this message in context: http://dojo-toolkit.33424.n3.nabble.com/Question-about-object-error-of-xhrPost-tp3221428p3221729.html Sent from the Dojo Toolkit mailing list archive at Nabble.com.