how to use the bounce effect in jquery

i have included the plugin and written code like

if(page) { $.post(page,{},function(data){callBackFunction(data)}); }

function callBackFunction(data)
{

$('.page_change').html(data);
$('.page_change').effect("bounce", { times:3 },开发者_开发百科 300);
$('#submit_show').show();
}

The data change is happening but the bouce effect i am not getting..how do i solve this issue..

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.effect() is in jQuery UI. Are you including the jQuery UI file?