// cookie handler
function set_cookie ( name, value, days)
{
  var date = new Date ( );  // current date & time
  date.setTime(date.getTime()+(days*2*60*60*1000));
  var cookie_string = name + "=" + escape ( value ) + "; expires=" + date.toGMTString() + "; path=/";
  document.cookie = cookie_string;
}

function delete_cookie ( cookie_name )
{
  set_cookie(cookie_name, "", -1);
}

function get_cookie(name) 
{
	var nameEQ = 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.substring(0, name.length) == 'menu' && i == 0)
      continue;
    else if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}