/////////////////////////// AJAX FUNCTIONS //////////////////////////////


///////////////////// Public Variables  ////////////////////////

 var errorRetryInterval = 10;
 // Ajax Master Array Variables //
 var xmlHttp = new Array();
 var xmlHttpPhpUrl = new Array();
 var xmlHttpresponse = new Array();
 var xmlHttpReturnType = new Array();
 var xmlHttpDisplayFunction = new Array();
 var debugmode = 1;



////////////////////// Error Handling //////////////////////////

function displayError($message,functionName)
{
   alert("Error!! Will retry in " +
   errorRetryInterval + "Seconds." +
   (debugmode ? "<br />" + $message : ""));
   if (functionName != 'none')
   {
      setTimeout("" + functionName + "();", errorRetryInterval * 1000);
   }
}

////////////////////// Ajax Functions //////////////////////////

function createXMLHttpRequestObject(xmlHttpId)
{
 try
 {
   xmlHttp[xmlHttpId] = new XMLHttpRequest();
 }
 catch(e)
 {
   var xmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
                                   "MSXML2.XMLHTTP.5.0",
                                   "MSXML2.XMLHTTP.4.0",
                                   "MSXML2.XMLHTTP.3.0",
                                   "MSXML2.XMLHTTP",
                                   "Microsoft.XMLHTTP");
      for (var i=0; i<xmlHttpVersions.length && !xmlHttp; i++)
      {
         try
         {
            xmlHttp[xmlHttpId] = new ActiveXObject(xmlHttpVersions[i]);
         }
         catch(e) {}
      }
 }
      if (!xmlHttp[xmlHttpId]) {
         alert("Error creating the xmlHttpRequest Object");
      }else{
         return xmlHttp[xmlHttpId];
      }
 }


  /////////////////// Internal Object Ajax Process //////////////////////

  // main call : processAjax('myphp.php?var1=foo', 'txt or xml', 'unique-Id', 'display-Function-Name');

 function processAjax(phpAddressStr, returnType, xmlHttpId, displayFunction)
  {
   xmlHttp[xmlHttpId] = createXMLHttpRequestObject(xmlHttpId);
   xmlHttpPhpUrl[xmlHttpId] = phpAddressStr;
   xmlHttpReturnType[xmlHttpId] = returnType;
   xmlHttpDisplayFunction[xmlHttpId] = displayFunction;
   

   if (xmlHttp[xmlHttpId])
   {
      try
      {
         xmlHttp[xmlHttpId].onreadystatechange = function(){processReturn(xmlHttpId);};
         xmlHttp[xmlHttpId].open("GET", xmlHttpPhpUrl[xmlHttpId], true);
         
         xmlHttp[xmlHttpId].send(null);
      }
      catch(e)
      {
         displayError(e.toString(),'none');
      }
   }
 }


 function processReturn(xmlHttpId)
 {

     if (xmlHttp[xmlHttpId].readyState == 4)
     {

          if (xmlHttp[xmlHttpId].status == 200)
          {
              //try
                // {
                         if(xmlHttpReturnType[xmlHttpId] == 'txt')
                        {
                           getResponseTxt(xmlHttpId);
                        }
                        else
                        {
                           getResponseXML(xmlHttpId);
                        }
                 //}
                // catch(e)
                 //{
                 //   displayError(e.toString(), 'none');
                 //}
          }
          else
          {
             displayError(xmlHttp[xmlHttpId].statusText, 'none');

          }
     }
     
 }


 function getResponseTxt(xmlHttpId){

  xmlHttpresponse[xmlHttpId] = xmlHttp[xmlHttpId].responseText;

  if (xmlHttpresponse[xmlHttpId].indexOf("ERRNO") >= 0
   || xmlHttpresponse[xmlHttpId].indexOf("error") >= 0
   || xmlHttpresponse[xmlHttpId].length == 0)
    throw(xmlHttpresponse[xmlHttpId].length == 0 ? "Response Server Error." : xmlHttpresponse[xmlHttpId]);

    var displayFunction = xmlHttpDisplayFunction[xmlHttpId] + '(' + xmlHttpId + ')';
    eval(displayFunction);
    clearAjaxArrays(xmlHttpId);
 }


 function getResponseXML(xmlHttpId){

  xmlHttpresponse[xmlHttpId] = xmlHttp[xmlHttpId].responseXML;

 // if (xmlHttpresponse[xmlHttpId].indexOf("ERRNO") >= 0
  // || xmlHttpresponse[xmlHttpId].indexOf("error") >= 0
  // || xmlHttpresponse[xmlHttpId].length == 0)
  //  throw(xmlHttpresponse[xmlHttpId].length == 0 ? "Response Server Error." : xmlHttpresponse[xmlHttpId]);

    var displayFunction = xmlHttpDisplayFunction[xmlHttpId] + '(' + xmlHttpId + ')';
    eval(displayFunction);

    clearAjaxArrays(xmlHttpId);
 }


 function clearAjaxArrays(xmlHttpId){
      // clean up arrays to stop memory leaks //
      delete xmlHttp[xmlHttpId];
      delete xmlHttpPhpUrl[xmlHttpId];
      delete xmlHttpresponse[xmlHttpId];
      delete xmlHttpReturnType[xmlHttpId];
      delete xmlHttpDisplayFunction[xmlHttpId];
 }

 ///////////////////////// End Internal Ajax Processes /////////////////////////
 
 
 
 
 //// <---------------  Calendar Display  ---------------> ////


function showCalendar(month, year){
	  
	  var calendarPage = "/scripts/ajax/loaders/calendar_create.php";
	  var randomNumb = Math.floor(Math.random()*1000);
      var getpwUrl = calendarPage + "?month=" + month + "&year=" + year + "";
      processAjax(getpwUrl, 'txt', randomNumb, 'getUpdatedCalendar');
}

function getUpdatedCalendar(xmlHttpId){

    var feedbackTxt = xmlHttpresponse[xmlHttpId];
	var divObj = document.getElementById('calendar-wrapper');

    divObj.innerHTML = feedbackTxt;
    //divObj.setAttribute('class', 'para_heading')
}


 function testForObject(Id, Tag){
  var o = document.getElementById(Id);
  if (o){
    if (Tag){
      if (o.tagName.toLowerCase() == Tag.toLowerCase()){
        return o;
      }
    }else{
      return o;
    }
  }
  return null;
}