function $() {
  var elements = new Array();
  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}
function InitAjax()
{
    var http_request = false;
    if (window.XMLHttpRequest)
    {
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType)
        {
            http_request.overrideMimeType('text/xml');
        }
    }
    else if (window.ActiveXObject)
    {
		try
        {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try
            {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            }catch (e)
            {}
        }
    }
    if (!http_request)
    {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }
    return http_request;
}
function readCookie(name) {
	var cookieValue = ""; 
	var search = name + "=";
	if(document.cookie.length > 0) { 
		offset = document.cookie.indexOf(search); 
		if (offset != -1) { 
			offset += search.length; 
			end = document.cookie.indexOf(";", offset); 
			if (end == -1) {
				end = document.cookie.length;
			}
			cookieValue = document.cookie.substring(offset, end) 
		}
	}
	return cookieValue; 
}
function checkLogin()
{
	var nick = readCookie("PP_nickname");
	nick = decodeURI(nick);
	if(nick != '' && nick != null)
	{
		return false;
	}
	else
	{
		return true;
	}
}