jquery ajax php results in unidentified index -

when try use ajax-method via jquery receive "unidentified index" message of targeted php file.

the interesting stuff. "debugging" methods console.log() in jquery , firebug network window showing me data sent! seems data doesn't php file. well, when send data usualy way php (post) there no problem. find behaviour (!) strange.

i asked developers know couldn't me problem. maybe (or we) overlooking something?

the php/html form:

    <form method="post" action="configurator2.php">          <label>name der navigation</label>         <br />         <input type="text" name="menuname" />         <br />          <input class="button" type="button" value="ajax it" />         <input class="button1" type="submit" value="php only" />     </form>      <div class="result"></div>  <script type="text/javascript">   $(document).ready(function() {      $(".button").click(function() {       var menuname = $('form input[name=menuname]').val();             $.ajax({             type:'post',             url:'configurator2.php',             data:{menuname:menuname},             datatype:'html',             success:function() {               $('.result').load('configurator2.php');           }           });     });    }); </script> 

and here php:

$name = $_post["menuname"]; echo $name; 

load here fires query server, time without parameters, causing error. actual result received. display on page, use received data:

success:function(data) {     $('.result').html(data); }