// JavaScript Document
//Gets the browser specific XmlHttpRequest Object 
function getXmlHttpRequestObject() {
 if (window.XMLHttpRequest) {
    return new XMLHttpRequest(); //Mozilla, Safari ...
 } else if (window.ActiveXObject) {
    return new ActiveXObject("Microsoft.XMLHTTP"); //IE
 } else {
    //Display our error message
    alert("Your browser doesn't support the XmlHttpRequest object.");
 }
}

//Our XmlHttpRequest object
var receiveReq = getXmlHttpRequestObject();

//Initiate the AJAX request
function makeRequest(url, param) {

//If our readystate is either not started or finished, initiate a new request
 if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
   //Set up the connection to captcha_test.html. True sets the request to asyncronous(default) 
   receiveReq.open("POST", url, true);

   //Set the function that will be called when the XmlHttpRequest objects state changes
  
   receiveReq.onreadystatechange = updatePage; 

   //Add HTTP headers to the request
   receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   receiveReq.setRequestHeader("Content-length", param.length);
   receiveReq.setRequestHeader("Connection", "close");

   //Make the request
   receiveReq.send(param);
 }   
}

//Called every time our XmlHttpRequest objects state changes
function updatePage() {
	
 //Check if our response is ready
 if (receiveReq.readyState == 4) {

   //Set the content of the DIV element with the response text
   document.getElementById('result').innerHTML = receiveReq.responseText;
	//Get a reference to CAPTCHA image
   	img = document.getElementById('imgCaptcha'); 
   	img.src = 'Inc/generate_image.php';
	
   
 }
}


//Called every time when form is perfomed
function getParam(theForm) {
 //Set the URL

 var url = 'comment.php';
 //Set up the parameters of our AJAX call
 var postStr;
 postStr  = theForm.scode.name + "=" + encodeURIComponent( theForm.scode.value );
 postStr +="," + theForm.name.name + "=" + encodeURIComponent( theForm.name.value );
 postStr +="," + theForm.email.name + "=" + encodeURIComponent( theForm.email.value );
 postStr +="," + theForm.comment.name + "=" + encodeURIComponent( theForm.comment.value );
 postStr +="," + theForm.nid.name + "=" + encodeURIComponent( theForm.nid.value );
 //Call the function that initiate the AJAX request

 makeRequest(url, postStr);
}

//Called every time when form is perfomed