问JS:计数器减少，在hide()

EN

$('.deleteButton').click(function() {
   var curn = parseInt($('.counter').text(), 10);
   if(curn - 1 >= 0)
      $('.counter').text(curn - 1); 
});

 <?php echo "Today (<span class='counter'>".mysql_num_rows($query)."</span>)"; ?>

<?php echo 'Today (<span class="counter">' . mysql_num_rows($query) . '</span>)'; ?>

$('#theTable').delegate('button.delete', 'click', function (event) {
    $(this).closest('tr').slideUp();

    $('span.counter').text(function (index, val) {
        return (parseInt(val, 10) - 1);
    });

    event.preventDefault();
});

<?php echo 'Today (<span id="number">'.mysql_num_rows($query).'</span>)'; ?>

// Get the number element once
var num = $('#number');

// Set an onclick event on your button
$('.delete').click(function(){

    // Find the closest table row and remove it
    $(this).closest( 'tr' ).remove();

    // num.text() will get the text inside the number element
    // parseInt is used to convert it from string to int
    // subtract 1 to update the number
    var newNumber = parseInt( num.text(), 10 ) - 1;

    // And set the new number text
    num.text( newNumber );

    // Stop the default browser action - might cause the page to reload or to scroll
    return false;
});