tsupo

/* convISBN.js : converter ISBN10 <-> ISBN13                 */
/*   Copyright (c) 2007 by H.Tsujimura  <tsupo@na.rim.or.jp> */
/*   Distributed by LGPL.                                    */
/*      this script written by H.Tsujimura  20 Jan 2007      */

function convISBN13toISBN10(str) {
    var s;
    var c;
    var checkDigit = 0;
    var result = "";