// 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 chkpublication() {

	// if blank, then we will not call the ajax
	if(document.getElementById('securityCode').value == "") {
		return false;
	}

  //alert("Navin");
  // proceed only if the xmlHttp object isn't busy
  if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
  {
  	document.getElementById('load').style.display = '';
	document.getElementById('crosspub').style.display = 'none';
	document.getElementById('tickpub').style.display = 'none';

	var code = document.getElementById('securityCode').value;

	code = encodeURIComponent(code);
	//alert("process_form.php?action=form&task=chkcode&code=" + code);
	// retrieve the name typed by the user on the form
    //name = encodeURIComponent(document.getElementById("myName").value);
    // execute the quickstart.php page from the server
    xmlHttp.open("GET", "process_form.php?action=form&task=chkcode&code=" + code, true);  
    // define the method to handle server responses
	//	alert('hello');

	xmlHttp.onreadystatechange = handleServerResponse;

    // make the server request
    xmlHttp.send(null);
  } else {
    // if the connection is busy, try again after one second  
    setTimeout('chkpublication()', 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) {

		document.getElementById('load').style.display = 'none';

		var divElement = document.getElementById("divmsg");
		
		var sCode = document.getElementById("scode");

		// extract the XML retrieved from the server
		xmlResponse = xmlHttp.responseText;
		//alert(xmlResponse + ' - ' + img);
		// if order have bad status
		if(xmlResponse == 'Y') {
			document.getElementById('tickpub').style.display = '';
			//alert(xmlResponse);
			divElement.innerHTML = 'OK';
			sCode.value = 1;
		} else if(xmlResponse == 'N') {
			document.getElementById('crosspub').style.display = '';
			divElement.innerHTML = 'NOT OK';
			sCode.value = 0;
		} else {
			//var pub = document.getElementById('publication').value;
			//pub.value = xmlResponse;
			alert('Problem occured while checking!');
			//alert('Problem in update!');
		}
		
		

		  // 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);
    }
	
  } else  {
		//document.getElementById("awl").innerHTML = "Working...";
		//document.getElementById("awlImg").style.display = '';
  	} 
}