HF Default Text for PMs

hf.defaultpmtext.user.js

// ==UserScript==
// @name         HF Default Text for PMs
// @namespace    Cammy
// @version      0.1
// @description  Sets a default greeting / signature message while writing HF PMs
// @author       You
// @match        *hackforums.net/private.php?action=send*
// @require      https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js
// ==/UserScript==

var textStart, textEnd;

usernameTo = $("textarea#to").val().split(',')[0];

if (usernameTo.length < 1)
{
    textStart = "Hey there!";
}
else
{
    textStart = "Hey " + usernameTo + "!";
}


var usernameFrom = $("strong").eq(1).text().split(',')[1];
usernameFrom = usernameFrom.substring(1, usernameFrom.length);

textEnd = "\n\n\n\nIn regards,\n" + usernameFrom;

$("textarea#message_new").val(textStart + textEnd);