function checkNick()
{
	if ($('nickname').value != "")
	{
		xml = new Ajax();
		xml.url = PATH_HTTP+"ajx/nickname.php";
		xml.params = "nick="+$('nickname').value;
		xml.doRequest();
		xml.onSuccess = function(responseText,responseXML)
		{
			$('nickinfo').innerHTML = responseText;
		}
	}
}