JSFiddle - React, Tailwind, and code Playground

HTML

<a name="send1" id="send1" href="#signup">go 1</a>
<a name="send2" id="send2" href="#signup">go 2</a>
<a name="send3" id="send3" href="#signup">go 3</a>

<div id="signup">
    <form action="send_form.php">
        <input name="text" type="text">
        <input name="hidden_field" id="hidden_field" type="hidden" />
        <button type="submit">Send</button>
    </form>
</div>

JavaScript

var the_anchor;

$('#signup').dialog({
    autoOpen:false,
    close: function(){
        $(this).dialog('close');
    }
});

$('a').click(function() {
    the_anchor = $(this).attr('id');
    $('#hidden_field').val(the_anchor);
    $('#signup').dialog('open');
});