test.html

<form action="/profile/index/sendmessage" method="post" enctype="application/x-www-form-urlencoded">
<div class="upload_form">
    <dt id="message-label"><label class="optional" for="message">Enter Message</label></dt>
    <dd id="message-element">
    <textarea cols="80" rows="50" id="message" name="message">
[{"resources": {"dut": "any_ts", "endpoint1": "multistream_endpoint", "endpoint2": "multistream_endpoint"}},

{"action": "create_conference", "serverName": "dut", "conferenceName": "GURU_SLAVE_TS"},

{"action": "dial_out_ep", "serverName": "dut", "confName": "GURU_SLAVE_TS", "epName": "endpoint1"}
]
        </textarea></dd>
    <dt id="id-label">&nbsp;</dt>
    <dd id="id-element">
    <input type="hidden" id="id" value="145198" name="id"></dd>
    <dt id="send_message-label">&nbsp;</dt>
    <dd id="send_message-element">
    <input type="submit" class="sendamessage" value="Send" id="send_message" name="send_message"></dd>
</div>
</form>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
$("input.sendamessage").click(function(event) {
event.preventDefault();

var message = $('textarea#message').val();
var id      = $('input#id').val();
url = "http://128.107.138.51:8080"

var posting = $.post(url, message)

posting.done(function( data ) {
  alert(message);
});
});


</script>