I am creating a private message system to allow users to communicate between one another within the context of the website (ie, not emails).

I have created this function to handle all my form submissions. I would like to achieve a solution without modifying this function (ideally).

$("form.reload").submit(function(){
    alert($(this).serialize()); /* Debugging */
    $.post($(this).attr("action"),
        $(this).serialize()
    ,function(data){
        if(data){
            $("#error").html(data);
        }else{
            location.reload();
        };
    });
    return false;
});

Within my form I am using JQuery Autocomplete to find usernames. This function works perfectly. My first solution was to add buttons within the form with the necessary values.

select: function(event, ui) {
    $("#message_to").append("<input type=\"button\" class=\"recipient\" name=\"recipients[]\" value=\"" + ui.item.label + "\" onclick=\"$(this).remove()\" />");
}

<form method="post" action="/messages-create">
<div id="message_to"></div>
</div>

For some reason the values of recipients are not getting posted.

My second solution was to add to a post array that already existed in the form

select: function(event, ui) {
    $(input[name=recipeients[]).val = ui.item.label; /* Need to add to array, not replace! */

    $("#message_to").append("<input type=\"button\" class=\"recipient\" name=\"recipient\" value=\"" + ui.item.label + "\" onclick=\"$(this).remove(); /* Remove from recipients */\" />");
}

<form method="post" action="/messages-create" class="reload">
<input type="hidden" name="recipients[]" value="" />
<div id="message_to"></div>
</div>

This works ok, but I have been unable to work out how to append to the recipients[] array only replace with the new label. Moving on from this, I also need to know how to then remove this value from the array.

Thanks in advance!