title: how to get jquery ajax status code
body: <p>I want to know that how can we get ajax status code in jquery.
  I have this ajax block:</p>
  
  <pre><code>$.ajax{
      type: "GET",
      url: "keyword_mapping.html",
      data:"ajax=yes&amp;sf="+status_flag,
  
      success: callback.success,
      complete: rollup_filters(),
      failure: function(){
          alert("Failure");
      }
      }
  </code></pre>
  
  <p>Now in above code, in case of failure, how can i get ajax status code and some description of that status code ??</p>