function Ajax()
{
  	var http_request = false;
	   //var _datareturn='';//data return
	var _postvalue='';//get data from form value
	var _method='';//get or post
	var _url='';//url address
	var _responsetype='';//text or xml
	var _formobject;//form id
	var _documentid='';//get document id
	function setMethod(setValue){
		_method=setValue;
	return false;
	}	

	this.setMethod=setMethod;
	function setUrl(setValue){
		_url=setValue;
	}
	
	this.setUrl=setUrl;
	function setResponseType(setValue){
		_responsetype=setValue;
	}
	
	this.setResponseType=setResponseType;
	function setDocumentId(setValue){
		_documentid=setValue;
	}
	
	this.setDocumentId=setDocumentId;
	function setFormObject(setValue){
		_formobject=setValue;
	}
	
	this.setFormObject=setFormObject;
	function createRequest()
	{
		http_request = false ;
		if (window.XMLHttpRequest) 
		{ // Mozilla, Safari ,...
			http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) 
		{
			http_request.overrideMimeType('text/xml');
			// See note below about this line
		}
	} 
	else 
		if (window.ActiveXObject) 
		{ // IE
		var aVersions = [ "MSXML2.XMLHttp.6.0", 
		"MSXML2.XMLHttp.5.0", 
		"MSXML2.XMLHttp.4.0", 
		"MSXML2.XMLHttp.3.0", 
		"Microsoft.XMLHTTP" ];
		for (var i = 0; i < aVersions.length; i++) 
		{
		try 
		{ 
		http_request = new ActiveXObject(aVersions[ i ]);
		break;
		}
		catch (e)
		{
		// Do nothing 
		} 
		}//end for
		}//end if window.ActiveXObject
		if (!http_request) 
		{
		alert ('Giving up :( Cannot create an XMLHTTP instance');
		return false;
		}
		var timestamp = new Date();
		var uniqueURI = _url+ (_url.indexOf("?") > 0 ? "&" : "?")+ "timestamp="+ 
			  timestamp.getTime();
		if(_method=="get")
		{
		http_request.open('GET', uniqueURI, true);
		http_request.onreadystatechange = handleResponse;
		http_request.send(null);
		}
		else
		{
		if(!_formobject)return false;
		for(i = 0; i < _formobject.length; i++)
		{
		if (_postvalue.length) _postvalue += '&';
		switch(_formobject.elements[i].type)
		{
		case "text":
		_postvalue += _formobject.elements[i].name + '=' +   
						   encodeURI(_formobject.elements[i].value);
		break;
		case "password":
		_postvalue += _formobject.elements[i].name + '=' + 
						   encodeURI(_formobject.elements[i].value);
		break;
		case "textarea":
		_postvalue += _formobject.elements[i].name + '=' + 
						   encodeURI(_formobject.elements[i].value);
		break;
		case "hidden":
		_postvalue += _formobject.elements[i].name + '=' + 
						  encodeURI(_formobject.elements[i].value);
		break;
		case "select-one":
		if(_formobject.elements[i].selectedIndex>=0)
		{
		_postvalue += _formobject.elements[i].options[_formobject.elements[i].
							selectedIndex-1].value;
		}
		break;
		}//end switch
		}//end for
		http_request.open('POST', uniqueURI, true);
		http_request.onreadystatechange = handleResponse;
		http_request.setRequestHeader('Content-Type', 
					 'application/x-www-form-urlencoded');
		http_request.send(_postvalue);
		for(i = 0; i < _formobject.length; i++)
		{
		if((_formobject.elements[i].type=="text")||
		(_formobject.elements[i].type=="textarea")||
		(_formobject.elements[i].type=="hidden")||
		(_formobject.elements[i].type=="password"))
		_formobject.elements[i].value="";
		}
		}//end else
	}//end function
	
	this.createRequest=createRequest;
	function handleResponse()
	{
		if (http_request.readyState == 4) 
		{
		if (http_request.status == 200) 
		{
		var docid=new Array();
		var i;
		docid=_documentid.split('~');
		if(_responsetype=="text")
		{
		var responsetxt=new Array();
		responsetxt=http_request.responseText.split('|');
		for(i=0;i<docid.length;i++)
		{
		document.getElementById(docid[i]).innerHTML=''+responsetxt[i];
		}
		}
		else if(_responsetype=="xml")
		alert(http_request.responseXML);
		} else alert('There was a problem with the request.');
		}//else alert('There was a problem with the request '+http_request.readyState);
		return false;
		}//end function
}//end class

function doRequest(requestmethod, urladdress, responsetype, documentid, formobject){
try
{
	var obj=new Ajax();
	obj.setMethod(requestmethod);
	obj.setUrl(urladdress);
	obj.setResponseType(responsetype);
	obj.setDocumentId(documentid);
	if(formobject)
	{
	obj.setFormObject(formobject);
	}
	obj.createRequest();
	}catch(ex)
	{
	alert(ex.message);
	}
}