ajax

$(document).ready(function(){
    $("#your-dropdown-id").change(function(){
        var drid = $(this).val();
        $.ajax({
            url: 'getUsers.php',
            type: 'post',
            data: {value:drid},
            dataType: 'json',
            success:function(response){
				// add the json response into html values
                }
            }
        });
    });

});


@csrf_exaampt
def ajax_view():
	response = {}
	if request.POST and request.is_ajax():
		print (request.POST)
        # get the value from post
        # make json value
        return HttpResponse(json.dumps(response))