//CODED BY MUNTAZIR MEHDI.

//function to get XMLHTTPObject to process asynchronous calls.
function getXMLHttp()
{
  var xmlHttp
  try
  {
    //Firefox, Opera 8.0+, Safari
    xmlHttp = new XMLHttpRequest();
	if (xmlHttp.overrideMimeType){
    	xmlHttp.overrideMimeType('text/xml');        
    }	
  }
  catch(e)
  {
    //Internet Explorer
    try
    {
      xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch(e)
    {
      try
      {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch(e)
      {
        alert("Your browser does not support AJAX!")
        return false;
      }
    }
  }
  return xmlHttp;
}

//function called by the front-end html page to process async call back.
function MakeRequest(id, page)
{
	var callToPhp = "./include/asyncResponse.php?id="+id+"&page="+page;	
	var response = "<div class='Loader' align='center'><img src='./images/load.gif'/></div>";	
	document.getElementById('clientResponse').innerHTML = response;
  var xmlHttp = getXMLHttp();
  
  xmlHttp.onreadystatechange = function()
  {
    if(xmlHttp.readyState == 4)
    {
      HandleResponse(xmlHttp.responseText);
    }
  }  
  xmlHttp.open("GET", callToPhp, true); 
  xmlHttp.send(null);
}

function Authorize_user(user, password)
{
	var PageUrl = "./include/authorize.php?uname="+user+"&password="+password;
	var response = "<img src='./images/load.gif' />";	
	document.getElementById('loginDiv').innerHTML = response;
	var xmlHttp = getXMLHttp();
	xmlHttp.onreadystatechange = function()
	{
    	if(xmlHttp.readyState == 4)
    	{			
      		document.getElementById('loginDiv').innerHTML = xmlHttp.responseText;			
    	}
  	}  
    xmlHttp.open("POST", PageUrl, true); 
    xmlHttp.send(null);
	//alert(PageUrl);
}

//function to send email.
function sendmail(sendername, senderemail, sendersubject, sendermessage)
{
	//devising necessary variables and values.
	var sender = sendername+":"+senderemail;	
	
	var responseDiv = document.getElementById('mailDiv');
	var callToPhp = "./include/sendmail.php?from="+sender+"&subject="+senderemail+"&message="+sendermessage;	
	
	//calling ajax functions.
	var xmlHttp = getXMLHttp();
	xmlHttp.onreadystatechange = function()
	{
    	if(xmlHttp.readyState == 4)
    	{			
      		responseDiv.innerHTML = xmlHttp.responseText;	
			document.getElementById('send').disabled = false;
    	}
  	}  
    xmlHttp.open("POST", callToPhp, true); 
    xmlHttp.send(null);	
}

//function to render response returned by async call.
function HandleResponse(response)
{
  document.getElementById('clientResponse').innerHTML = response;
}

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