<script>
        function addShared(){

            travelid=$("#hid_travelid").val();
            //alert(travelid);
            $.ajax({
               // url: "/chapter2/index.php/Home/Index/addsharedjifen",

                url: "__CONTROLLER__/addsharedjifen",

                data:{travelid:travelid},
                type:"POST",
                success: function (datas) {
                    alert(datas);
                   // callpay();
                }
                ,error:function(xmlHttpRequest,textStatus, errorThrown){
                    alert("in,Requeststatus: " + xmlHttpRequest.status + ", readyState: " + xmlHttpRequest.readyState+", textStatus: " +textStatus);

                }
            })
</script>

控制器中：
 public function addsharedjifen(){

.
.
$this->ajaxReturn("ok");
}