function xmlhttp() 
{
	try{return new ActiveXObject("Msxml2.XMLHTTP");} catch(e){}
	try{return new ActiveXObject("Microsoft.XMLHTTP");} catch(e){}
	try{return new XMLHttpRequest();} catch(e){}
	alert("XMLHttpRequest Object not existed!!");
	return null;
}
var debug = 0;
function fwXMLHttpForm (_host) {

// Public Properties

	this.xmlhttp = new xmlhttp();
	this.result = "";

// Private Methods

	this._createBoundary = function () {
		var tmp = Math.random();
		var thisDate = new Date();
		tmp = Math.abs(tmp*thisDate.getTime());
		tmp = "--------" + tmp + "--------";
		return tmp;
	}

	this._createField = function (_field, _value) {
		var tmp = "--" + this._boundary + this.CRLF;
		tmp += "Content-Disposition: form-data; name=\"" + _field + "\"" + this.CRLF;
		tmp += "Content-Transfer-Encoding: binary" + this.CRLF + this.CRLF;
		tmp += _value + this.CRLF
		tmp += "--" + this._boundary + "--" + this.CRLF + this.CRLF;
		return tmp;
	}

	var formObj = this;
	this.xmlhttp.onreadystatechange = function () {
		if (formObj.xmlhttp.readyState == 4) {
			if (formObj.xmlhttp.status == 200) {
				formObj.result = formObj.xmlhttp.responseText;
			}
			else {
				formObj.errCode = formObj.xmlhttp.status;
				formObj.result = formObj.xmlhttp.responseText;
				alert("Error in request!! HTTP RESPONSE STATUS: " + formObj.errCode);
			}
		}
	}

// Private Properties

	this._boundary = this._createBoundary();
	this._host = _host;
	this._fields = new Array();
	this.CRLF = "\r\n";

// Public Methods

	this.addField = function (_field, _value) {
		this._fields.push(new Array(_field, _value));
	}

	this.removeField = function (_field) {
		for (var i=0; i<this._fields.length; i++) {
			var tmp = this._fields[i];
			if (tmp[0] == _field) {
				this._fields.splice(i,1);
			}
		}
	}

	this.emptyField = function () {
		this._fields = new Array();
	}

	this.send = function () {
		this.xmlhttp.open("POST", this._host);
		var msgBody = "";
		for (var i=0; i<this._fields.length; i++){
			var tmp = this._fields[i];
			msgBody += this._createField(tmp[0], tmp[1]);
		}
		this.xmlhttp.setRequestHeader("Content-Type","multipart/form-data; boundary="+this._boundary);
		this.xmlhttp.setRequestHeader("Connection","Keep-Alive");
		this.xmlhttp.setRequestHeader("Content-Length",msgBody.length);
		this.xmlhttp.send(msgBody);
	}
}