WELCOME USER USERSCRIPT Yissss

welcome.user.js

// ==UserScript==
// @name          WELCOME USER
// @author        Robert Lemon
// @version       1.1
// @namespace     
// @description   Adds a welcome button to the chat.
// @include       http://chat.stackoverflow.com/rooms/*
// ==/UserScript==

function exec(fn) {
  var script = document.createElement('script');
  script.setAttribute("type", "application/javascript");
  script.textContent = '(' + fn + ')();';
  document.body.appendChild(script); // run the script
}
 
window.addEventListener("load", function () {
  // script injection
  exec(function () {
    var btn = $('<button class="button" style="margin-left: 2px;">Welcome</button>'),
      room = document.forms[0].elements.room.value;
    btn.on('click', function () {
      var modal = $('<div><h4>Welcome Whom?</h4></div>'),
        $users = $('#present-users:not(.more)').clone();
      modal.append($users).addClass('popup room-popup').css({
        bottom: btn.position().top,
        left: btn.position().left
      }).on('click', function (e) {
	    if( e.target.className === 'more' ) {
			return;
		}
        $('#input').val("@" + (e.target.title.replace(/ /g, '')) + " Welcome to the " + $('#roomname').text() + " chat! " + $('#roomdesc').text());
        $('#sayit-button').click();
        modal.remove();
        return false;
      });
      $(document.body).append(modal);
      return false;
    });
    $('#chat-buttons').append(btn);
  });
}, false);