michael@0: // don't crash
michael@0: var book = 'Ps';
michael@0: var pattern =   "(?:"
michael@0: +                   "(?:"
michael@0: +                       "(?:"
michael@0: +                           "(?:-|)"
michael@0: +                           "\\s?"
michael@0: +                       ")"
michael@0: +                       "|"
michael@0: +                   ")"
michael@0: +                   " ?"
michael@0: +                   "\\d+"
michael@0: +                   "\\w?"
michael@0: +               ")*";
michael@0: var re = new RegExp(pattern);
michael@0: '8:5-8'.match(re);