blocking request with jQuery.ajax()

block_request.js

$(document).ready(function() {
  $('#foo').bind('click', function() {
    doSomething();  
  });
});

var doSomething = function(){
  $('#foo').unbind('click');
  
  $.ajax({
    type: "POST",
    url: "some.do"
  }).done(function() {
    $('#foo').bind('click', function() {
      doSomething();  
    });    
  });
}