function createXmlHttpObject() {
	
	/* === használati példa === */
	/*
	var xmlhttp = createXmlHttpObject();
	xmlhttp.open("POST", "admin_user.php", true);
	xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	xmlhttp.send("action=delete_user&userid="+userid);		
	xmlhttp.onreadystatechange = function() {   
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {   
			
		}   
	}  
	
	var xmlhttp = createXmlHttpObject();
	xmlhttp.open("GET", "start.php?lang=hu&page=galeria&spage=keplista");
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {   
			document.getElementById('div_galeria').innerHTML =xmlhttp.responseText;
		}
	}
	xmlhttp.send(null);
	*/
	
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	}else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
			}
		}
	}
	return http_request;
}

/**
*
*  URL encode / decode
*  http://www.webtoolkit.info/
*
**/

var Url = {

	// public method for url encoding
	encode : function (string) {
		return escape(this._utf8_encode(string));
	},

	// public method for url decoding
	decode : function (string) {
		return this._utf8_decode(unescape(string));
	},

	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}

		}

		return utftext;
	},

	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;

		while ( i < utftext.length ) {

			c = utftext.charCodeAt(i);

			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}

		}

		return string;
	}

}

function kuld() {
	document.urlap.zbzop.value='zupak';
	
	var xmlhttp = createXmlHttpObject();
	xmlhttp.open("POST", "uzenet.php", true);
	xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	xmlhttp.send(
		"zbzop="+document.urlap.zbzop.value+
		'&nev='+Url.encode(document.urlap.nev.value)+
		'&email='+Url.encode(document.urlap.email.value)+
		'&telefon='+Url.encode(document.urlap.telefon.value)+
		'&visszajelzes='+Url.encode(document.urlap.visszajelzes[0].checked?'telefon':'email')+
		'&uzenet='+Url.encode(document.urlap.uzenet.value)+
		'&honlap='+Url.encode(document.urlap.honlap.value)+
		'&referer='+Url.encode(document.urlap.referer.value)
	);		
	xmlhttp.onreadystatechange = function() {   
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			if (xmlhttp.responseText=='ok') {
				alert('Üzenetét továbbítottuk, hamarosan válaszolunk!');
			}else{
				alert(xmlhttp.responseText);
			}
		}
	}
}