jQuery(document).ready(function(){
 
$(".deleteitem").click(function(){
 
var parent = $(this).closest('TR');
 
var id = parent.attr('id');
 
$.ajax({
 
type: "POST",
 
data: "id=" +id,
 
URL: "your_delete_script.php",
 
success: function(msg){
 
$('#'+id).remove();
 
}
 
});
});
});

mysql_connect(xxxxxxxx) or die(mysql_error());
 
mysql_select_db("a6932004_banquit") or die(mysql_error());
 
$id = $_POST['id'];
 
if (isset($id)) {
 
$query = "DELETE FROM dataventas WHERE Comprobante = '$id'";
 
mysql_query($query) or die('Error, insert query failed');
 
}

<tr id="<? echo $rows[5];?>">
<td align="center"> <? echo $rows[1]; ?></font></td>
<td><font color="orange"><? echo $rows[2]; ?></td>
<td align="center" style="font-size:25px"><font color="red"><b><? echo $rows[3]; ?></b></font></td>
<td align="center"><font color="green"><? echo number_format((int) $rows[4]); ?></font></td>
<td><button class="deleteitem"><img src="eliminar.gif"></button></td>  
</tr>

error: function (jqXHR, exception) {
                console.log("Error al eliminar un registro" + exception + jqXHR); /*no me acuerdo de las propiedades de los objetos*/
            }