Get table or gridview textbox value using jquery

//HTML

<table id="GVAnganwadi">

    <tr>

        <td>

            <input type="text" class="firstName" value="foo1">

        </td>

                 <td>

            <input type="text" class="lastName" value="bar1">

        </td>

    </tr>

    <tr>

        <td>

            <input type="text" class="firstName" value="foo2">

        </td>

                <td>

            <input type="text" class="lastName" value="bar2">

        </td>

    </tr>

    <tr>

        <td>

            <input type="text" class="firstName" value="foo3">

        </td>

                 <td>

            <input type="text" class="lastName" value="bar3">

        </td>

    </tr>

    <tr>

        <td>

            <input type="text" class="firstName" value="foo4">

        </td>

                 <td>

            <input type="text" class="lastName" value="bar4">

        </td>

    </tr>

</table>

//Query

$(function () {

        $("[id*=GVAnganwadi] tr:has(td)").each(function () {

            var tt = $(this).children('td:eq(1)');

            var mm = tt.children(0).val()

            alert(tt.children(0).val());

            tt.children(0).css("background-color", "red");

        });

    });

//table