var xmlhttp;

function checkRecaptcha(str, str2) {
	xmlhttp = GetXmlHttpObject();
	if (xmlhttp == null) {
		alert ("Your browser does not support AJAX!");
		return;
	}
	var url = "validateRecaptcha.php";
	url = url + "?r=" + str + "&r2=" + str2;
	url = url + "&sid=" + Math.random();
	xmlhttp.onreadystatechange = stateRecaptchaChanged;
	xmlhttp.open("GET", url, true);
	xmlhttp.send(null);
}

function showCity(str) {
	xmlhttp = GetXmlHttpObject();
	if (xmlhttp == null) {
		alert ("Your browser does not support AJAX!");
		return;
	}
	var url = "getcity.php";
	url = url + "?s=" + str;
	url = url + "&sid=" + Math.random();
	xmlhttp.onreadystatechange = stateCityChanged;
	xmlhttp.open("GET", url, true);
	xmlhttp.send(null);
}

function showGCity(str) {
	xmlhttp = GetXmlHttpObject();
	if (xmlhttp == null) {
		alert ("Your browser does not support AJAX!");
		return;
	}
	var url = "getcity.php";
	url = url + "?gs=" + str;
	url = url + "&sid=" + Math.random();
	xmlhttp.onreadystatechange = stateGCityChanged;
	xmlhttp.open("GET", url, true);
	xmlhttp.send(null);
}

function stateRecaptchaChanged() {
	if (xmlhttp.readyState == 4) {
		if (xmlhttp.responseText == '1') {
			document.getElementById("txtCity").innerHTML = xmlhttp.responseText;
		} else {
			return false;
		}
	}
}

function stateCityChanged() {
	if (xmlhttp.readyState != 4) {
		document.getElementById("txtCity").innerHTML = '<img src="images/indicator.gif" alt="loader" border="0" width="30" height="30" />';
	}
	if (xmlhttp.readyState == 4) {
		document.getElementById("txtCity").innerHTML = xmlhttp.responseText;
	}
}

function stateGCityChanged() {
	if (xmlhttp.readyState != 4) {
		document.getElementById("txtGCity").innerHTML = '<img src="images/indicator.gif" alt="loader" border="0" width="30" height="30" />';
	}
	if (xmlhttp.readyState == 4) {
		document.getElementById("txtGCity").innerHTML = xmlhttp.responseText;
	}
}

function GetXmlHttpObject() {
	if (window.XMLHttpRequest) {
		// code for IE7+, Firefox, Chrome, Opera, Safari
		return new XMLHttpRequest();
	}
	if (window.ActiveXObject) {
		// code for IE6, IE5
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}