JavaScript:
<script>
function changeinput()
{
$.ajax({
url : "url.php",
type: "POST",
data: $("#form_id").serialize()
}).done(function(response){
if (response == "no") {
window.location.href = \'?t=xxx\';
}
else {
$("#success_spanid").load("success.php");
}
});
}
</script>