'function' : function (fieldObj,option) {
    var v = fieldObj.value =
      fieldObj.value.toString().replace(/\s/g,'').toUpperCase();
    if (!v) { return false; }
    var bm = v.match(/^JM-\d+-\S{4}[1-9Zz]{6}$/);
    if ( v.match(/^JM-\d+-\S{4}[1-9Zz]{6}$/) ) { return true; }
    var map = {};
    var dv = 0;
    $w('A B C D E F G H J K L M N P Q R T U V W Y 3 4 6 7 8 9').each(
      function(d){ map[d] = dv++; }
    );
    var chars = v.toArray().reverse();
    var check = chars.shift();
    chars = chars.findAll(function(d){ return map[d] != null });
    if (chars.length != 19) { return false; }
    var totalVal = 0;
    var flip = 1;
    chars.each(function(c){
        var posVal = map[c];
        if ( !(flip = !flip) ) { posVal *=2 }
        while(posVal){
            totalVal = totalVal + (posVal % 10);
            posVal = Math.floor(posVal/10);
        }
    });
    return ( check == ( 10 - totalVal % 10 ) % 10 );
}