about jquery ajax it work but don't send data in form

about jquery ajax it work but don't send data in form

the function than i use in my work
$(function(){
$('#group2').change(function(){
var url='jtsprocess2.php';
var dataSet={ go2: $('#group2').val() };
$.post(url,dataSet,function(data){
//alert(data);
$('#all6').html(data);
});
});
});
i call out at tag : <tr id=all6></tr>
it send databack to first page but when i submit form it doesn't go. other
value in form go but not this function.