I am using the vertical SD menu I downloaded from this site several years ago and id has worked fine until I tries to remove one of the tabs the I get the following JS error: 'this.submenu[...]' is null or not an object.
The on screen display says the error is at line 31, char 5 of the script. The script is original and has never been modified.

This is the code at that position:
[code]
this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
}
}
};

Any help would be appreciated.

Jim K.