[jQuery] getting data using html attribute

[Alain Roger]

Hi,

i have several html tags with some additional attributes like 'type' or
'abbr'. for example :
<th id="col_1" class="ColumnHeader" align="center" abbr="language" type="
editabletext" style="width: 130px;">Language</th>

now i have a function which should fill the TD tag of another table based on
the abbr attribute of my first table (like you can see the TH above).
this function looks like that :
$.getJSON("lg.php",{ start: 0, offset : 10 },
        function(data)
                {
                    $.each(data.records, function(i,item){

                        var o = "<tr>";

                        $("#frm_table th").each(function(j){

                            var tp = $(this).attr("type");

                            if (tp != null && tp != "")
                            {
                              switch (tp)
                                {
                                  case 'selectrow':
                                      o += "<td><input type=checkbox
name='rec' value='" + item.id + "'></input></td>";
                                            break;

                                        case 'editabletext':
                                            var field =
$(this).attr("abbr");
                                            o +=  "<td>" + item +"." + field
+ "</td>";
                                            break;
                                }
                            }
                        });
                        o += "</tr>";
                        $("#data_grid").append(o);
                    });

now my problem is that i'm not able to retrieve the item.id or item.language
of my JSON records when i do:
o +=  "<td>" + item +"." + field + "</td>";

i guess it's because it is taken as simple string concatenation and does not
cast it as object.
so how can i solve it ?
thanks a lot.

Alain