$(document).ready(function(){
        $('a#kayit').click( gonder );
    });   
function gonder(){ 
$('#mail_sonuc').slideDown('slow'); 
$("#mail_sonuc").html('<div id=resim><img src="doku/images/preloader.gif" /></div>'); 
$.ajax({ 
type:'POST', 
url:'islem.php', 
data:$('#bultenmail').serialize(), 
success:function(reh){ 
     
    $("#mail_sonuc").html(reh) 

} 
}) 

}