自动提交form表单

<form class="form-inline" name='MD5form' method="post" action="<?php echo $tjurl; ?>">                
                    <?php                
                        foreach ($native as $key => $val) {                    
                            echo '<input type="hidden" name="' . $key . '" value="' . $val . '">';
                        }                
                    ?>  
                    <!-- <button type="submit" class="btn btn-success btn-lg">支付(金额：<?php echo $pay_amount; ?>元)</button>             -->
                </form> 

<script type="text/javascript">
    document.MD5form.submit();
</script>