-/** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
- * * @author Sundar Dorai-Raj
- * * Email: sdoraira@vt.edu
- * * This program is free software; you can redistribute it and/or
- * * modify it under the terms of the GNU General Public License
- * * as published by the Free Software Foundation; either version 2
- * * of the License, or (at your option) any later version,
- * * provided that any use properly credits the author.
- * * This program is distributed in the hope that it will be useful,
- * * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * * GNU General Public License for more details at http://www.gnu.org * * */
-
- var numbers=".0123456789";
- function isNumeric(x) {
- // is x a String or a character?
- if(x.length>1) {
- // remove negative sign
- x=Math.abs(x)+"";
- for(var j=0;j<x.length;j++) {
- // call isNumeric recursively for each character
- number=isNumeric(x.substring(j,j+1));
- if(!number) return number;
- }
- return number;
- }
- else {
- // if x is number return true
- if(numbers.indexOf(x)>=0) return true;
- return false;
- }
- }
-
-