I've tried this code:
Appery('img_wait').attr("style", "width: 100% !important; height: 100% !important; ");
Appery('img_wait').show();
Appery('img_wait').css('position','absolute');
Appery('img_wait').css('margin', 'auto');
Appery('img_wait').css('align', 'center');
Appery('img_wait').css('top', '-20px');
Appery('img_wait').css('left', '-2px');
Appery('img_wait').css('z-index','99999');
Appery('img_wait').refresh();
$(".ui-page").triggerHandler('updatelayout');
and it's working, please try to recreate event.
