Collecting data with jQuery from a table
<table>
    <thead>
       <tr>
           <th></th>
           <th>Name</th>
           <th>Email</th>
       </tr>
    </thead>
    <tbody>
        <tr>
            <td class='checkinput'>
                <input type="checkbox" name="names" value="MD5_HASH"/>
            </td>
            <td>
                John Doe
            </td>
            <td>
                email@mail.com
            </td>
        </tr>
        <!-- etc. -->
    </tbody>
</table>

$("tr").click(function() {
    var $checkbox = $(this).find(":checkbox");
    $checkbox.attr('checked', !$checkbox.attr('checked'));
});

$("tr").click(function(e) {
    if ($(e.target).is(':checkbox')) return;
    var $checkbox = $(this).find(":checkbox");
    $checkbox.attr('checked', !$checkbox.attr('checked'));
});

var emails = [];
$("table tbody tr:has(input:checkbox:checked)").each(function(){
   emails.push( $('td.email', $(this)).text() );
});

$("tr).click(function(e) {
if (e.target.id==xxx)      //  if ($('#'+e.target.id).attr('class')=='classssss') ...
....


});

$(".table tr:gt(0)").each (

function () {

alert($('td:eq(2)',$(this)).text());

}
);