// stores the reference to the XMLHttpRequest object
var xmlHttp = createXmlHttpRequestObject(); 

// retrieves the XMLHttpRequest object
function createXmlHttpRequestObject() 
{	
  // will store the reference to the XMLHttpRequest object
  var xmlHttp;
  // if running Internet Explorer
  if(window.ActiveXObject)
  {
    try
    {
      xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch (e) 
    {
      xmlHttp = false;
    }
  }
  // if running Mozilla or other browsers
  else
  {
    try 
    {
      xmlHttp = new XMLHttpRequest();
    }
    catch (e) 
    {
      xmlHttp = false;
    }
  }
  // return the created object or display an error message
  if (!xmlHttp)
 
    alert("Error creating the XMLHttpRequest object.");
  else 
    return xmlHttp;
}

// make asynchronous HTTP request using the XMLHttpRequest object 
function process()
{
var time = new Date();
var len;
  // proceed only if the xmlHttp object isn't busy
name = document.getElementById("myName").value;
len = name.length;
  if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0 && len == 5)
  {
    // retrieve the name typed by the user on the form
    
    // execute the quickstart.php page from the server
    xmlHttp.open("POST", "tst.php");  
    // define the method to handle server responses
    xmlHttp.onreadystatechange = handleServerResponse;
	xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

    // make the server request
    xmlHttp.send("name=" + name);
	
  }
  else
    // if the connection is busy, try again after one second  
    setTimeout('process()', 1000);
}

// executed automatically when a message is received from the server
function handleServerResponse() 
{
  // move forward only if the transaction has completed
  if (xmlHttp.readyState == 4) 
  {
    // status of 200 indicates the transaction completed successfully
    if (xmlHttp.status == 200) 
    {
      // extract the XML retrieved from the server
      xmlResponse = xmlHttp.responseText;
      document.getElementById("Message").innerHTML =  xmlResponse ;
      // restart sequence
      setTimeout('process()', 1000);
    } 
    // a HTTP status different than 200 signals an error
    else 
    {
      alert("There was a problem accessing the server: " + xmlHttp.statusText);
    }
  }

}