<img src="images/delete.gif" width="16" height="16" id="delete" name="delete" idvalue='123' />  

$('delete').click(function() {
 var id = $(this).attr('idvalue');
 // do post or other function like this
 $.post('http://*********',{idvalue:id},function(data) {
  alert('server result:' + data);
 });
});