Posting editor contents with XMLHTTPRequest

var vMyText = FCKeditorAPI.GetInstance("myeditor").GetData(true);
var vPostData = "FirstParam=1&text=";
vPostData += encodeURIComponent(vMyText);

if(vRequestObject == null)
   vRequestObject = CreateRequestObject();  // creation of the XmlHttpRequestObject
   
if(vRequestObject == null)
{
   alert("Error: unable to create request object");
   return;
}
   
var ifModifiedSince = new Date(0); // January 1, 1970

vRequestObject.onreadystatechange = handler;
vRequestObject.open("POST", url, true);
vRequestObject.setRequestHeader("If-Modified-Since", ifModifiedSince);
vRequestObject.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
vRequestObject.setRequestHeader("Content-length", vPostData.length);
vRequestObject.setRequestHeader("Connection", "close");
vRequestObject.send(vPostData);