none of these events is raised. why? what is the best practice to make the record events as you do with document.ready?

  $ (function () {

             alert ("go");

             $ (". ButtonMenu"). bind ("tap" Go);

         });

         $ (document) .on ("pagecontainerbeforeload", function () {

             alert ("pagecontainerbeforeload event fired!");

         });

         $ (document) .on ("pagecontainerbeforeshow", function () {

             alert ("pagecontainerbeforeshow event fired!");

         });

         $ (document) .on ('pagecontainershow', function (e, ui) {

             alert ("pagecontainershow");

         });