DelayedEventHandler.js

var foo = {
  buttonHandler: function(e) {
    if(foo.AjaxState == "Executing") {
      foo.AjaxSuccessCallback = function() {foo.buttonHandler.call(e);};
    } else {
      //button handler code goes here
    }
  },
  MakeAjaxCall: function() { 
    foo.AjaxState = "Executing";
  },
  Ajaxsuccess: function(e) {
    foo.AjaxState = "Done";
  },
  AjaxState: "",
  AjaxsuccessCallback: null
}