ajax成功回调submit方法失效？

Question

        $('.gopay').click(function(){
            if(jsons!=''){
                var index = parent.layer.load(2, {shade:0.3,time: 100*10000});
                $.ajax({                  
                    type: "get",
                    url:ctx+'/order/orderInfo/toPayCheck',
                    data:{data:JSON.stringify(json)},
                    dataType:'json',
                    error: function(XMLHttpRequest, textStatus, errorThrown) {
                        if(XMLHttpRequest.responseText){
                            parent.layer.close(index); 
                             parent.layer.alert(XMLHttpRequest.responseText, {icon: 2});    
                         }
                         else{
                             parent.layer.close(index); 
                             parent.layer.alert('系统异常', {icon: 2});
                             
                         }
                    },
                    success: function(data) {
                        var msg=data;
                        if(msg.code==0000){
                         //成功提示
                         parent.layer.close(index);
                        submitform();
                                   
                        }
                        else{
                         parent.layer.close(index);
                         parent.layer.alert(msg.message, {icon: 2});    
                        }
                    }
                });                                
            }
        })
        function submitform(){
              $('.money').val(jsons.sumPay);
                $('.orderNo').val(jsons.No);
                $('.orderIds').val(ids);
                $('#hiddenform').submit();
                console.log(1)
        };

 <form action="${ctx}/order/orderInfo/toPay" method="post" id="hiddenform" target="_blank" >
         <input type="hidden" name="money" class="money">
         <input type="hidden" name="orderNo" class="orderNo">
         <input type="hidden" name="orderIds" class="orderIds ">
     </form>

在ajax成功以后想要提交表单就提交不了。