I am adding two text box values by onkey up event. every time data entered, will be submited to the server and then result will be returned by json. I am getting a text box by j
Looks to me like your adding the keyup events to the ".submitme" classed elements in the domready, but the firsttextbox isnt yet on the document.
its added on your #combo's change event so its not getting a keyup event assigned to it.
When you asynchronously add the combo box (or any element) it does not get the keyup event binding. You have to use .live() like so:
$(".submitme").live("keyup", function() {
// stuff
});
See the jQuery documentation for details on how .live() works.