get next tr

HTML

<table border="1">
    <tr><td>1</td><td>value</td></tr>
    <tr><td>1.1</td><td>value</td></tr>
    <tr><td>2</td><td>value</td></tr>
    <tr><td>2.1</td><td>value</td></tr>
    <tr><td>2.2</td><td>value</td></tr>
</table>

JavaScript

$(document).on('click', 'tr', function(){
    alert($(this).last('tr').children().html())
})