How to increment the html attribute class

How to increment the html attribute class using jquery. i am actually working on a php/ajax data grid. it works on tables and dynamically i am loading rows result from the database. After the user has added rows with results in one table, the user can add new heading and add new rows in new tables. I am using the following code to do this

var v = jQuery("#frmSovMca").validate({
            errorLabelContainer: $("div.msg-error2"),

            submitHandler: function(form) {
                jQuery(form).ajaxSubmit({
                    success: function(response)    {

                        obj = jQuery.parseJSON(response);

                        if (obj.status == '<?php echo OBJECT_STATUS_SUCCESS; ?>')    {
                            $('#result3').html('<div class="msg msg-thanks">Mca Added/Updated Successfully</div>');
                            setTimeout("$('#result3').html('')", 2000);
                            // $("td.addmca2"+vCounter).html(obj.message);
                            vcounter=<?php $_SESSION['vCounter']; ?>+"";

                            if(obj.title==vcounter){
                                $("td.addmca2").append(obj.message);

                                $("#Gtotal").html(obj.GrandTotal);
                                $("#Percentage").html(obj.Percentage);

                            }else{
                                $("td.addmca2").html(obj.message);

                                $("#Gtotal").html(obj.GrandTotal);
                                $("#Percentage").html(obj.Percentage);

                            }

                        }    else{
                            $('div.msg-error2').html('<div class="msg msg-error">'+obj.error+'</div>');
                            setTimeout("$('div.msg-error2').html('')", 2000);
                        }

                    },
                    clearForm:    false,
                    resetForm:    false
                });
            }
        });
    });
but i cant get the counter variable incremented from php , i need to use it for incrementing the class attribute to insert the new result in new row with the class incremented.

the php code is here

$aSovMca = fGetSovMca($vSubID, $sovID, 0, $_SESSION['bidID']);

                    $aSovMca['message'] = fGetScheduleX($aSovMca);

                    $aSovMca['status'] = OBJECT_STATUS_SUCCESS;

                    $vGrandTotal = fGetGrandTotal($_SESSION['bidID']);
                    $vPercentage = fGetPercentage($vGrandTotal);
                    $aSovMca['Percentage'] = $vPercentage;
                    $aSovMca['GrandTotal'] = $vGrandTotal;

                    echo json_encode($aSovMca);

function fGetScheduleX($aSovMca) {

    $vList = '


<table style="margin-top:10px;" border="0" cellpadding="0" cellspacing="0" width="750px" class="">

                <tr height="30" >
                    <td colspan="6" align="left" class="menu2_bg">
                        <table>
                            <td class="simple_bold_blue" width="700">' . $aSovMca[0]['bidSovTitle'] . '</td>
                            <td align="right" style="margin-left:100px;"><a class="sidebar" href="javascript:void(0);" onclick="javascript:fEditSov(' . $aSovMca[0]['bidSovId'] . ');">Edit</a></td>
                        </table>
                    </td>
                    <td align="right" class=""></td>

                </tr>

        </table>
                <table border="0" cellpadding="0" cellspacing="0" width="750px">

                         <tr height="30">
                                <td align="left" colspan="5" width="20%" bgcolor="#F8F8F8" class="simple_bold_blue" style="border:1px solid #D9D9D9;">MCA No.</td>
                                <td width="30%" align="left" bgcolor="#F8F8F8" class="simple_bold_blue blue_border_tbl">MCA Title</td>
                                <td width="25%" align="left" valign="middle" bgcolor="#F8F8F8" class="simple_bold_blue blue_border_tbl">Source Quote (CAD)</td>
                                <td width="10%" align="left" valign="middle" bgcolor="#F8F8F8" class="simple_bold_blue blue_border_tbl">Your Quote(CAD)</td>
                                <td width="15%" align="left" valign="middle" bgcolor="#F8F8F8" class="simple_bold_blue blue_border_tbl">
                                </td>
                            </tr>';

    foreach ($aSovMca as $thisVal)
        $vList .= '

                            <tr>
                                <td width="129" colspan="5" align="left" valign="top" style="font-size:12px;border-left:1px solid #D9D9D9;" class="two_border" >' . $thisVal['McaCode'] . '</td>
                                <td align="left" valign="top" style="font-size:12px" class="two_border">' . $thisVal['McaName'] . '</td>
                                <td align="left" valign="top" style="font-size:12px" class="two_border">' . $thisVal['YQuoteValue'] . '</td>
                                <td align="left" valign="top" style="font-size:12px" class="two_border"></td>
                                <td align="left" valign="top" style="font-size:12px" class="two_border"><a class="sidebar" href="javascript:void(0);" onclick="javascript:fEditMcaValue(' . $thisVal['bidSovMcaID'] . ');">Edit</a> | <a class="sidebar" href="javascript:void(0);" onclick="javascript:fConfirmDelete(' . $thisVal['bidSovMcaID'] . ');">Remove</a></td>
                            </tr>
                   ';

    $vList .= ' </table><br/>';

    return $vList;
}

this is the html table in which i am appending the db result
<table>
            <tr class="addmca2">
                <td class="addmca2"></td>
            </tr>
        </table>

please help me how can i get the soulution out of it
please email me the answer at ignitious_php@hotmail.com