<?php // rnsignup.php
include_once 'rnheader.php';
echo <<<_END
<script>

function checkUser(user)
{
	if (user.value == '')
	{
		document.getElenebtById('info').innerHTML = ''
		return
	}
	params = "user=" + user.value
	request = new ajaxRequest()
	request.open("POST', "rncheckuser.php", true)
	request.setRequestHeader("Content-type",
		"application/x-www-from-urlecoded")
		request.setRequestHeader("Content-length", params.length)
		request.setRequestHeader("Connection", "close")
		request.onreadystatechange = function()
		{
			if (this.readyState == 4)
			{
				if (this.status == 200)
				{
					if (this.responseText != null)
					{
						document.getElementById('info').innerHTML =
							this.responseText
					}
					else alert("Ошибка Ajax: Данные не получены")
				}
				else alert("Ошибка Ajax: "+ this.statusText)
			}
		}
		request.send(params)
	}
	
	function ajaxRequest()
	{
		try
		{
			var request = new XMLHttpRequest()
		}
		catch(e1)
		{
			try
			{
				request = new ActiveXObject("Msxml2.XMLHTTP")
			}
			catch(e2)
			{
				try
				{
					request = new ActiveXObject("Microsoft.XMLHTTP")
				}
				catch(e3)
				{
					request = false
				}
			}
		}
		return request
	}
	</script>
	
	<h3>Регистрация</h3>
	_END;
	
	$error = $user = $pass = "";
	if (isset($_SESSION['user'])) destroySession();
	
	if (isset($_POST['user']))
	{
		$user = sanitizeString($_POST['user']);
		$pass = sanitizeString($_POST['pass']);
		
		if ($user == "" || $pass == "")
		{
			$error = "Данные введены не во все поля<br /><br />";
		}
		else
		{
			$query = "SELECT * FROM rnmembers WHERE user='$user'";
			
			if (mysql_num_rows(queryMysql($query)))
			{
				$error = "Такое имя пользователя уже используется<br /><br />";
			}
			else
			{
				$query = "INSERT INTO rnmembers VALUES('$user', '$pass')";
				queryMysql($query);
			}
			
			die("<h4>Учетная запись создана, пожалуйста, войдите на сайт
		}
	}
	
	echo <<<_END
	
	<form method='post' action='rnsignup.php'>$error
	Username <input type='text' maxlength='16' name='user' value='$user'
		onBlur='checkUser(this)' /><span id='info'></span><br />
	Password <input type='text' maxlength='16' name='pass'
		value='$pass' /><br />
	            
	<input type='submit' value='Signup' />
	</form>
	_END
	?>