<%@ LANGUAGE=JScript %>
<%
  //. . .

  xmlDocument.validateOnParse = true;
  xmlDocument.loadXML(xmlStr);
  if (xmlDocument.parseError. errorCode != 0)
  {
    returnStr = "Parse Error: " + xmlDocument.parseError.reason 
                + "<BR>" +
      "occurred at line: " + xmlDocument.parseError.line + "<BR>" +
      "-------------<BR>" +
      "source: " + xmlDocument.parseError.srcText;
    }
    else
    {
      // ... do whatever
    }
  
    Response.Write(returnStr);
%>