var xmlHttp;
// Ravi Syamala, SWE 437
// standard create xml request object method.
function createXmlHttpRequest()
{
    if(window.ActiveXObject)
    {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
        xmlHttp=new XMLHttpRequest();
    }
}
function startRequest()
{
  // create the request object
  createXmlHttpRequest();
  // gather the value in the TextArea field
  var u1=document.form1.testPassage.value;
  // open the connection to the XML-returning servlet, note the escape on the testPassage form field
  // escape is needed in order to avoid truncating the message (new lines, etc).
  xmlHttp.open("GET","https://cs.gmu.edu:8443/offutt/servlet/ajaxstutter.ajaxstutter?testPassage="+escape(u1) ,true)
  // wire up an event reciever method (handleStateChange) for when the server responds.
  xmlHttp.onreadystatechange=handleStateChange;

  // null-terminate the stream to finish sending.
  xmlHttp.send(null);

}
function handleStateChange()
{
    if(xmlHttp.readyState==4)
    {
        if(xmlHttp.status==200)
            {
          var message =
             xmlHttp.responseXML
                    .getElementsByTagName("message")[0]
                    .childNodes[0].nodeValue;
                // add list item start and end tags now
                // for this example, this ends up being easier than parsing more xml.
                message = message.replace(/!1/g, "<li>");
                message = message.replace(/!2/g, "</li>");
                // put the message in a nicely formatted (CSS) list.
                message = "<ul>" + message + "</ul>";
                // display the message in the results.
             document.getElementById("results").innerHTML=message;
            }
        else
        {
           alert("Error loading page  "+ xmlHttp.status + ": "+xmlHttp.statusText);
        }
    }
}