jquery收集表单数组及去掉字符串最后的逗号！

jquery收集表单数组：

<input type='text' name='one[]' value='' /><br>
<input type='text' name='one[]' value='' /><br>
<input type='text' name='one[]' value='' /><hr>
<input type='text' name='two[]' value='' /><br>
<input type='text' name='two[]' value='' /><br>
<input type='text' name='two[]' value='' /><br>
<input type='button' value='提交' >
<script type='text/javascript'>
(function(){
    var oneval = twoval = '';
    $("input[type='button']").click(function(){
        $("input[name='one[]']").each(function(index,element){
            oneval += $(this).val()+',';
        });
        oneval = oneval.substring(0,oneval.length-1);
        $("input[name='two[]']").each(function(index,element){
            twoval += $(this).val()+',';
        });
        twoval = twoval.substring(0,twoval.length-1);
        console.log(oneval);
        console.log(twoval);
    });
})();
</script>

掉字符串最后的逗号：

twoval = twoval.substring(0,twoval.length-1);