Serialize inputs in table rows (jQuery)

This should do what you need:

<table>
    <tr id="101">
        <td><input type="text" name="f1" value="" /></td>
        <td><input type="checkbox" name="f2" value="v2" /></td>
        <td><input type="checkbox" name="f3" value="" /></td>
        <td><select name="f4">
                <option>1</option>
                <option>2</option>
                <option>3</option>
            </select></td>
    </tr>
    <tr id="102">
        <td><input type="text" name="f1" value="" /></td>
        <td><input type="checkbox" name="f2" value="v2" /></td>
        <td><input type="checkbox" name="f3" value="" /></td>
        <td><select name="f4">
                <option>1</option>
                <option>2</option>
                <option>3</option>
            </select></td>
    </tr>
    <tr id="103">
        <td><input type="text" name="f1" value="" /></td>
        <td><input type="checkbox" name="f2" value="v2" /></td>
        <td><input type="checkbox" name="f3" value="" /></td>
        <td><select name="f4">
                <option>1</option>
                <option>2</option>
                <option>3</option>
            </select></td>
    </tr>

</table>
<button id="btnGo">Go</button>
<script type="text/javascript">
    $('#btnGo').click(function(){
        var data={};
        $('table').find('tr').each(function(){
            var id=$(this).attr('id');
            var row={};
            $(this).find('input,select,textarea').each(function(){
                row[$(this).attr('name')]=$(this).val();
            });
            data[id]=row;
        });
        console.log(data);
    });
</script>

Haven't tested but something like this should work

var myjson = new Object();
$("#tableid > tr").each(function () {
  var tablerow = $(this);
  $("td input", tablerow).each(function () {
    var input = $(this);
    myjson[tablerow.attr("id")][input.attr("name")] = input.val();
  });
});