SOLVED - $_POST data gets truncated...

Hi,

I'm trying to implement CKEditor in a work-related project using Ajax.

When displayed as 'innerhtml' the webpage displays the entered data correct. But whenever an 'unusual' character is entered (like &,',§...) the data gets truncated at this character.

Can anybody help me out please? I added the Javascript code (see below)...

Thanks in advance,
steven

<script type="text/javascript" language="javascript">
   var http_request = false;
   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            // set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;
           
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
   var dedatum = CKEDITOR.instances.mytextarea1.getData();
      var poststr = encodeURI("mytextarea1=" + dedatum);
      makePOSTRequest('bewaar_informatie.php', poststr);
   }
</script>