// AJAX object

// encodeURIComponent encodes special characters like , / ? : @ & = + $ #

var responseDiv = "";

function ajaxObject(url, callbackFunction, responseDiv) { 
responseDiv = responseDiv;
var that=this;        
this.updating = false;  
this.abort = function() {    
if (that.updating) {      
that.updating=false;      
that.AJAX.abort();      
that.AJAX=null;    
}  
}  
this.update = function(passData,postMethod) {
if (that.updating) { return false; }    
that.AJAX = null;                              
if (window.XMLHttpRequest) {                    
that.AJAX=new XMLHttpRequest();                  
} else {                                        
that.AJAX=new ActiveXObject("Microsoft.XMLHTTP");    
}                                                 
if (that.AJAX==null) {                                   
return false;                                   
} else {      
that.AJAX.onreadystatechange = function() {          
if (that.AJAX.readyState==4) {                       
that.updating=false;                          
that.callback(that.AJAX.responseText,that.AJAX.status,that.AJAX.responseXML,responseDiv);                  
that.AJAX=null;                                                 
}                                                            
}                                                              
that.updating = new Date();                                    
if (/post/i.test(postMethod)) { 

// encode all POST data

var str = ""; 
for(var i = 0;i < passData.elements.length;i++) { 
switch(passData.elements[i].type){ 
case "text": 
case "textarea": 
case "password": 
if (!passData.elements[i].disabled) str += passData.elements[i].name + "=" + encodeURIComponent(passData.elements[i].value) + "&"; 
break; 
case "hidden": 
// hidden cannot be disabled 
str += passData.elements[i].name + "=" + encodeURIComponent(passData.elements[i].value) + "&"; 
break; 
case "checkbox": 
case "radio": 
if(passData.elements[i].checked && !passData.elements[i].disabled) str += passData.elements[i].name + "=" + encodeURIComponent(passData.elements[i].value) + "&"; 
break; 
case "select-one": 
if (!passData.elements[i].disabled) str += passData.elements[i].name + "=" + encodeURIComponent(passData.elements[i].options[passData.elements[i].selectedIndex].value) + "&"; 
break; 
case "select-multiple": 
if (!passData.elements[i].disabled){ 
for (var j = 0; j < passData.elements[i].length; j++){ 
var optElem = passData.elements[i].options[j]; 
if (optElem.selected == true){ 
str += passData.elements[i].name + "[]" + "=" + encodeURIComponent(optElem.value) + "&"; 
} 
} 
} 
break; 
} 
} 
// strip final &amp; 

str = str.substr(0,(str.length - 1));

// end secure

var uri=urlCall+'?'+that.updating.getTime();        
that.AJAX.open("POST", uri, true);        
that.AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
// this line gives error in chrome
// that.AJAX.setRequestHeader("Content-Length", str.length);        
that.AJAX.send(str);      
} else {        
var uri=urlCall+'?'+passData+'&timestamp='+(that.updating.getTime());         
that.AJAX.open("GET", uri, true);                                     
that.AJAX.send(null);                                               
}                    
return true;                                                 
}                                                                             
}  
var urlCall = url; 
this.callback = callbackFunction || function () { };
}

// processData process ajaxObject response: optional
// ajaxObject processes task and ignores response when processData is not used
// different functions can be made to serve different purposes

function processResponse(responseText, responseStatus, responseXML, responseDiv) {  
	if (responseStatus==200 || responseStatus==304) {    
		parent.top.document.getElementById(''+responseDiv+'').innerHTML=responseText; 
	} else {    
		//showPop('connection'); 
	} 
}

// use when waiting needs to be shown , and timeout

function processWait(request,div,action){
	if (request.updating) {  
		parent.top.document.getElementById('' + div + '').innerHTML = '' + action + '';
	} else { 
		alert('this object is idle');
	}
}