<script type="text/javascript">
var frm = $('#giris_form');
frm.submit(function () {
$.ajax({
type: frm.attr('method'),
url: frm.attr('action'),
data: frm.serialize(),
success: function (data) {
$("#girissonuc").hide().html(data).fadeIn(1000);
$("#girissonuc").delay(1500);
$("#girissonuc").fadeOut(1000);
}
});

return false;
});
</script>

function SepeteEkle(urun_ID,adet)
{
$('.cart-load').show().delay(1500).fadeOut(1000);
$('.view-account').hide().delay(2500).fadeIn(1000);
$.ajax({
type: 'GET',
url: site + '/sepete_ekle.php',
data: 'urun_ID='+urun_ID + '&adet=' + adet,
success: function(sonuc) {
$('#sepet_urun_sayisi').html(sonuc);
}
});
}

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>