title: dojo.xhrPost fix Access-Control-Allow-Origin issue
body: <p>I am trying to POST data using my sub domain using dojo, but dojo returns me this error.</p>
  
  <blockquote>
    <p>XMLHttpRequest cannot load <a href="http://uri.com/" rel="nofollow">http://uri.com/</a> Origin  <a href="http://sub.uri.com/" rel="nofollow">http://sub.uri.com/</a> is
    not allowed by Access-Control-Allow-Origin.</p>
  </blockquote>
  
  <pre><code>    var form= dojo.byId("form");
      dojo.connect(formSignIn, "onsubmit", function(event){
          event.preventDefault();
          var xhrArgs = {
            form: form,
            handleAs: "text",
            load: function(data){
              //dojo.byId("response").innerHTML = "Form posted.";
            },
            error: function(error){
              //dojo.byId("response").innerHTML = "Form posted.";
            }
          }
          var deferred = dojo.xhrPost(xhrArgs);
          console.log(deferred);
      });
  </code></pre>
  
  <p>this is my code. is there any available options in dojo.xhrPost that can enable me to access my main website so i can process my POST?</p>