function ajaxRequest(url, method, data, asynch, responseHandler, isXML)
{
  var request = new XMLHttpRequest();
  request.open(method, url, asynch);

  if (method == "POST")
  	request.setRequestHeader("Content-Type",
                           "application/x-www-form-urlencoded"); 
  if (isXML)
  	request.setRequestHeader('Content-Type', 'text/xml');
 
  request.onreadystatechange = function()
  {
  	//alert(request.readyState);
    if (request.readyState == 4) {
  	//alert(request.status);
	if (request.status == 200) {
          responseHandler(request.responseText);
      }
    }
  };
  request.send(data);
}