var xmlHttp;

function sendMail() {
	xmlHttp = GetXmlHttpObject();

	if (xmlHttp==null) {
		alert ("Your browser does not support AJAX!");
		return;
	}

	var name = document.mailer.name.value;
	var email = document.mailer.email.value;
	var subject = document.mailer.subject.value;
	var message = document.mailer.message.value;

	var url = "/backend/contact.php?rnd=" + Math.random();;
	var params = "name=" + escape(name) + "&email=" + escape(email) + "&subject=" + escape(subject) + "&message=" + escape(message);

	xmlHttp.open("POST", url, true);

	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", params.length);
	xmlHttp.setRequestHeader("Connection", "close");

	xmlHttp.onreadystatechange = stateChanged;
	xmlHttp.send(params);
}

function stateChanged() {
	if (xmlHttp.readyState==4) {
		if (xmlHttp.responseText == 'Your message has been sent. We will get back to you as soon as possible. You may now browse away from this page.') {
			document.mailer.name.value = '';
			document.mailer.email.value = '';
			document.mailer.subject.value = 'General';
			document.mailer.message.value = '';
		}
		
		alert(xmlHttp.responseText);
	}
}

function GetXmlHttpObject() {
	var xmlHttp=null;

	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}

	catch (e) {
		// Internet Explorer
		try {
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		}

		catch (e) {
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}