Question

I don’t know what I’ve done wrong with the code 😐

http://javaphils.org/navigation/pag/

Click on the navigations, it slides up but the slidedown doesn’t work.

Answer 1

I’m pretty sure the bug is here :

success: function()
{
     $('#reconds').slideUp(5000,SmartAjax.proceed);
},
done: function()
{
    $('#reconds').slideDown(5000);
} 

The SmartAjax.proceed certainly show the div that your are filling info. So the div is already shown when you try to do the slide down.
Everything else seems fine.