function mnuFoldMenu(){

  var undefined;
  var item = 'mnuSub';
 	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(item) ==0) {
      var x = c.split('=');
      // check if on screen
      ctrl = getControlById(x[0]);
      if (ctrl != undefined) {
        // correct display.
        var inline = readCookie(ctrl.id);
        ctrl.style.display = (inline == 'true' ? 'inline': 'none');
      }
    }
	}
}