var objNumber = 0; // Current AJAX request number
var maxObjNumber = 10; // Maximum number of AJAX request

function ajax() // AJAX Class
{
	this.method = "GET"; // Send Method can be "GET" or "POST"
	this.url = ""; // URL Address, from where we can get content
	this.objOut = ""; // ID name where output will display
	this.objWait = ""; // ID name where Wait Image will display
	this.para = ""; // Parameter list for "GET" or "POST" method. Format is "variable1=value1&variable2=value2&........"
	this.funcName = ""; // Function name where we want to pass control after geting contents.
	this.type = ""; // Type can be empty(text) or XML.
	this.send = sendRequest; // After providing required information this method call for process and geting contents
	this.img = document.createElement('img'); // Image object for wait image
	this.imgPath = "" // Image path for wait image. You can change it on runtime
	this.formType = "application/x-www-form-urlencoded"
}

function sendRequest() // This function call from AJAX class
{
	if(this.url=="")
	{
//		alert("No any URL Address Enter");
		return false;
	}
	//this.url=this.url+"&"+new Date().getTime();
	ns4 = (document.layers)? true:false;
	ie4 = (document.all)? true:false;
	centerX = 0;
	centerY = 0;

	if(ie4)
	{
		centerX = document.body.offsetWidth / 2;
		centerY = document.body.offsetHeight / 2;
	}
	else
	{
		if(ns4)
		{
			centerX = window.innerWidth / 2;
			centerY = window.innerHeight / 2;
		}
	}

	varName = "ajaxObj" + objNumber++
	if(objNumber>=maxObjNumber)
	{
		objNumber = 0;		
	}

//	this.img.setAttribute('src', this.imgPath);
//	this.img.setAttribute('id', "wimg" + objNumber);
//	this.img.style.position = "absolute";
//	this.img.style.visibility = "hidden";
//	if(this.objWait=="")
//	{
//		this.img.style.left = centerX
//		this.img.style.top = centerY
//	}
//	else
//	{
//		var wimg = document.getElementById(this.objWait)
//		this.img.style.left = getXOffset(wimg);
//		this.img.style.top = getYOffset(wimg);
//	}
//	document.getElementById('tmp').appendChild(this.img);

	eval(varName + " = new createXMLHttp()");
//	eval(varName + ".onreadystatechange = function() {processRequest(" + varName + ",'" + this.objOut + "', '" + this.img.id + "','" + this.funcName +"','" + this.type +"');}");
	eval(varName + ".onreadystatechange = function() {processRequest(" + varName + ",'" + this.objOut + "', '" + "" + "','" + this.funcName +"','" + this.type +"');}");
	eval(varName + ".open(\""+ this.method +"\", \"" + this.url + "\", true)");
	eval(varName + ".setRequestHeader('Content-Type', '" + this.formType + "')");
	eval(varName + ".send('" + this.para + "')");
}

function createXMLHttp() // Initializing AJAX object
{
	var req;
	if(window.XMLHttpRequest){
		req = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
		var avers = ["Microsoft.XmlHttp", "MSXML2.XmlHttp", "MSXML2.XmlHttp.3.0", "MSXML2.XmlHttp.4.0", "MSXML2.XmlHttp.5.0"];
	   for (var i = avers.length -1; i >= 0; i--) {
		  try {
			 req = new ActiveXObject(avers[i]);
			 } catch(e) {}
	   }
	} else {
//		alert('There was a problem creating the XMLHttpRequest object');
	}
	return req;
}

function processRequest (obj,output, objwimg, funcName, type) // function for checking response and placing data on required place
{
	if (obj.readyState == 1) {
//		document.getElementById(objwimg).style.visibility = "visible";
   }
   if (obj.readyState == 2) {
   }
   if (obj.readyState == 3) {
   }
   if (obj.readyState == 4) {
	if (obj.status == 200) {
			if(type=="xml")
			{
				getString = obj.responseXML;
			}
			else
			{
				getString = obj.responseText;
			}
			if(!output=="")
				document.getElementById(output).innerHTML = getString;
			obj = null;
			if(!trim(funcName)=="")
			{
				eval(funcName + "(getString)");
			}
		}
		else
		{
//			alert("Can not process your request. Please try again.")
		}
//		document.getElementById(objwimg).style.visibility = "hidden";
	}
}

function getXOffset(element) // Geting center location varticaly
{
     var tmpEl = element;
     var offset = 0;
     while ( tmpEl != null) {
          offset += tmpEl.offsetLeft;
          tmpEl = tmpEl.offsetParent;
     }
     return offset;
}

function getYOffset(element) // Geting middle location horizantaly
{
     var tmpEl = element;
     var offset = 0;
     while ( tmpEl != null) {
          offset += tmpEl.offsetTop;
          tmpEl = tmpEl.offsetParent;
     }
     return offset;
}

function ltrim( value ) {
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
}

function rtrim( value ) {
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
}

function trim( value ) {
	return ltrim(rtrim(value));
}