SE Chat Emoticons userscript

sechatty.user.js

// ==UserScript==
// @name          SE Chat Emoticons
// @author        Robert Lemon 
// @namespace     http://rlemon.com
// @description      Replaces frequently used emoticons with images in the chat system.
// @include       http://chat.stackexchange.com/rooms/*
// @include       http://chat.stackoverflow.com/rooms/*
// ==/UserScript==

/* RIGHT NOW I LAGG REALLY BAD */

function EmbedCodeOnPage(type, kode) {
    var elm = document.createElement(type);
    elm.textContent = kode;
    document.head.appendChild(elm);
}

function EmbedFunctionOnPageAndExecute(fn) {
    EmbedCodeOnPage("script", "(" + fn.toString() + ")()");
}
var css = ".emoticon{background-image:url(http://i.stack.imgur.com/QZvZ0.png);height:16px;width:16px;display:inline-block}.emoticon.e0{background-position:0px 0px}.emoticon.e1{background-position:-16px 0px}.emoticon.e2{background-position:-32px 0px}.emoticon.e3{background-position:-48px 0px}.emoticon.e4{background-position:-64px 0px}.emoticon.e5{background-position:-80px 0px}.emoticon.e6{background-position:-96px 0px}.emoticon.e7{background-position:-112px 0px}.emoticon.e8{background-position:0px -16px}.emoticon.e9{background-position:-16px -16px}.emoticon.e10{background-position:-32px -16px}.emoticon.e11{background-position:-48px -16px}.emoticon.e12{background-position:-64px -16px}.emoticon.e13{background-position:-80px -16px}.emoticon.e14{background-position:-96px -16px}.emoticon.e15{background-position:-112px -16px}.emoticon.e16{background-position:0px -32px}.emoticon.e17{background-position:-16px -32px}.emoticon.e18{background-position:-32px -32px}";
EmbedCodeOnPage("style", css);
EmbedFunctionOnPageAndExecute(function() {
var map = [
    [/\:\(/g, "e0"],
    [/\:\'\(/g, "e1"],
    [/\:\)/g, "e2"],
    [/\:D/g, "e3"],
    [/\:P/g, "e4"],
    [/\;P/g, "e5"],
    [/\;\)/g, "e6"],
    [/T\_T/, "e7"],
    [/\>\:\(/g, "e8"],
    [/\ಠ\_\ಠ/g, "e9"],
    [/XD/g, "e10"],
    [/XP/g, "e11"],
    [/D\:/g, "e12"],
    [/\;D/g, "e13"],
    [/\:d/g, "e14"],
    [/Xd/g, "e15"],
    [/\^\_\^/g, "e16"],
    [/\:S/g, "e17"],
    [/\:\|/g, "e18"]
    ];
	var elm = $('#chat');
    var parseText = function() {
        $.each(map, function(i, e) {
            elm.html(elm.html().replace(e[0], "<span class='emoticon " + e[1] + "'></span>"));
        });
    };
    var tmp = $.scrollTo;
    $.scrollTo = function() {
        tmp.apply($, arguments);
        parseText();
    };
});