How to send post request without submit button

I have form where I don't have submit button and actually the form didn't send post request, so my question how is possible to send request on image click?

@foreach($items as $item)
        <form class="form-horizontal" role="form" method="post" action="">
            
            <div class="col-md-3">
                <div class="well"> 
                    <a href=""><img class="img-responsive center-block" src="" alt=""></a>
                    <h4 class="text-center"></h4>
                </div>
            </div> 
        </form>
        @endforeach

Thank you

via Chebli Mohamed