<table class="table" id="friendTable">
    <thead>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Voter)
            </th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.Voter)
            </td>
        </tr>
        }    
    </tbody>
</table>

if (rows[i].cells[0] == true)

if (rows[i].cells[0].checked)

if (rows[i].cells[0].text()==true)

$('friendTable').ready(function countVoters() {

        var table = document.getElementById('friendTable');
        var rows = table.rows;
        var total = 0;
        
        for (var i = 1, iLen = rows.length - 1; i < iLen; i++) {
            if (rows[i].cells[0] == true) {
                total += 1;
            }
        }
        document.getElementById('totalVoter').innerHTML = total.toFixed(0);
    })