function send_message()
{
	var http_request_message;

	if (window.XMLHttpRequest)
	{
		http_request_message = new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{
		http_request_message = new ActiveXObject("Microsoft.XMLHTTP");
	}

	http_request_message.onreadystatechange = function()
	{
		if (http_request_message.readyState == 4)
		{
			if (http_request_message.status == 200)
			{
				document.getElementById('message_sent_confirmation').innerHTML = http_request_message.responseText;
			}
			else
			{

			}
		}
		else
		{
		}
	};

	http_request_message.open('POST', '/contact_us.php', true);
	http_request_message.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	http_request_message.send(
		'person_name='+encodeURIComponent(document.getElementById('message_person_name_textbox').value)+
		'&email='+encodeURIComponent(document.getElementById('message_email_textbox').value)+
		'&message='+encodeURIComponent(document.getElementById('message_textarea').value));
}

function clear_message()
{
	if(document.getElementById('message_person_name_textbox'))
		document.getElementById('message_person_name_textbox').value = '';
	if(document.getElementById('message_email_textbox'))
		document.getElementById('message_email_textbox').value = '';
	if(document.getElementById('message_textarea'))
		document.getElementById('message_textarea').value = '';	
}