// JavaScript Document

  function readCookie(name) {

	  var cookiename = name + "=";

	  var ca = document.cookie.split(';');

	  for(var i=0;i < ca.length;i++)
	  {

		  var c = ca[i];

		  while (c.charAt(0)==' ') c = c.substring(1,c.length);

		  if (c.indexOf(cookiename) == 0) return c.substring(cookiename.length,c.length);

	  }
	  return null;
  }
	
	function unsetCookie(name)
	{
    document.cookie = name + "=null; expires=Fri, 27 Jul 2001 02:47:11 UTC;";
	}