title: XMLHttpRequest changes POST to OPTION
body: <p>i have this code:</p>
  
  <pre><code>net.requestXHR = function() {
      this.xhr = null;
      if(window.XMLHttpRequest === undefined) {
          window.XMLHttpRequest = function() {
              try {
                  // Use the latest version of the activex object if available
                  this.xhr = new ActiveXObject("Msxml2.XMLHTTP.6.0");
              }
              catch(e1) {
                  try {
                      // Otherwise fall back on an older version
                      this.xhr = new ActiveXObject("Mxsml2.XMLHTTP.3.0");
                  }
                  catch(e2) {
                      //Otherwise, throw an error
                      this.xhr = new Error("Ajax not supported in your browser");
                  }
              }
          };
      }
      else
          this.xhr = new XMLHttpRequest();
  }
  net.requestXHR.prototype.post = function(url, data) {
      if(this.xhr != null) {
          this.xhr.open("POST", url);
          this.xhr.setRequestHeader("Content-Type", "application/json");
          this.xhr.send(data);
      }
  }
  
      var rs = new net.requestSpeech();
      console.log(JSON.stringify(interaction));
      rs.post("http://localhost:8111", JSON.stringify(interaction));
  </code></pre>
  
  <p>when the send execute, i have this log:</p>
  
  <pre><code>OPTIONS http://localhost:8111/ [HTTP/1.1 405 Method Not Allowed 74ms]
  </code></pre>
  
  <p>And in localhost:8111 i have a reslet serverResource that accept post, it is problem of same origin policy? i have modify the restlet to put the allow-origin header and i test it with another GET http request (in jquery) and work ok. I have the problem of same origin resolve because i use an html5 browser and my server put the headers in the response, so why the send shows me this error? why change POST for OPTION?
  Thanks!</p>
  
  <blockquote>
    <p>Possible duplicate?: I think no, but it's true, the problem is the
    same for both questions, but mine are refers since the question that
    there is an issue with the browser, and the other, first points to
    jquery. By experience the time does not count for duplicate, the
    answers are different but it's true that both questions complement
    each other.</p>
  </blockquote>