/*-------------------------------------------------------------
 Check Digit
 2001/02/14 Programmed by santiago
 Copyright (c) 2001 Iam Design Network. All Rights Reserved.
 $Id: checkDigit.js,v 1.1.1.1 2003/04/07 09:03:34 santiago Exp $
 --------------------------------------------------------------*/
function checkDigit(str) {
    for (var i = 0; i < str.length; i++) {
        var ch = str.substring(i, i + 1);
        if (!(ch >= "0" && ch <= "9")) {
            return false;
        }
    }
    return true;
}
function checkFloatMinus(str) {
    for (var i = 0; i < str.length; i++) {
        var ch = str.substring(i, i + 1);
        if (!(ch >= "0" && ch <= "9")) {
            if (ch == ".") continue;
            if (i == 0 && ch == "-") continue;
            return false;
        }
    }
    return true;
}