The adsense external file is called “http:// pagead2.googlesyndication.com/pagead/ show_ads.js”. It basically displays the ads. Here goes the entire code.

( function(){
// NOTE: This file is intended to be compiled with JSCompiler. If you are
// getting a compiler error when using a JavaScript built-in, please update
// google3/contentads/frontend/externs.js

function quoted(str) {
return (str != null) ? ‘”‘ + str + ‘”‘ : ‘”"‘;
}

function google_encodeURIComponent(str) {
if (typeof(encodeURIComponent) == ‘function’) {
return encodeURIComponent(str);
} else {
return escape(str);
}
}

function google_write_tracker(d, ad_url, tracker_event) {
var qloc = ad_url.indexOf(‘?’);
var img_src = ‘http://pagead2.googlesyndication.com/pagead/imp.gif?event=’;
img_src += tracker_event;
if (qloc != -1 && qloc + 1 < ad_url.length) {
img_src += ‘&’ + ad_url.substring(qloc + 1);
}
var img_tag = ‘<img height=”1″ width=”1″ border=”0″ ‘ +
’src=’ + quoted(img_src) +
‘ />’;
d.write(img_tag);
}

function google_append_url(param, value) {
if (value) {
window.google_ad_url += ‘&’ + param + ‘=’ + value;
}
}

function google_append_url_esc(param, value) {
if (value) {
google_append_url(param, google_encodeURIComponent(value));
}
}

function google_append_color(param, value, random) {
if (value && typeof(value) == ‘object’) {
value = value[random % value.length];
}
google_append_url(‘color_’ + param, value);
}

function google_get_user_data(w, date) {
var screen = w.screen;
var javaEnabled = navigator.javaEnabled();
var tz = -date.getTimezoneOffset();

if (screen) {
google_append_url(“u_h”, screen.height);
google_append_url(“u_w”, screen.width);
google_append_url(“u_ah”, screen.availHeight);
google_append_url(“u_aw”, screen.availWidth);
google_append_url(“u_cd”, screen.colorDepth);
}

google_append_url(“u_tz”, tz);
google_append_url(“u_his”, history.length);
google_append_url(“u_java”, javaEnabled);

if (navigator.plugins) {
google_append_url(“u_nplug”, navigator.plugins.length);
}
if (navigator.mimeTypes) {
google_append_url(“u_nmime”, navigator.mimeTypes.length);
}
}

function google_modify_client(client) {
client = client.toLowerCase();
if (client.substring(0, 3) != ‘ca-’) {
client = ‘ca-’ + client;
}
return client;
}

function google_write_iframe(w, d, ad_url) {
ad_url = ad_url.substring(0, 1000);
ad_url = ad_url.replace(/%\w?$/, ”);

if (w.google_ad_output == ‘js’ &&
(w.google_ad_request_done || w.google_radlink_request_done)) {
d.write(‘<script language=”JavaScript1.1″‘ +
‘ src=’ + quoted(ad_url) + ‘></’ + ’script>’);
} else if (w.google_ad_output == ‘html’) {
if (w.name == ‘google_ads_frame’) {
google_write_tracker(d, ad_url, ‘reboundredirect’);
} else {
d.write(‘<iframe’ +
‘ name=”google_ads_frame”‘ +
‘ width=’ + quoted(w.google_ad_width) +
‘ height=’ + quoted(w.google_ad_height) +
‘ frameborder=’ + quoted(w.google_ad_frameborder) +
‘ src=’ + quoted(ad_url) +
‘ marginwidth=”0″‘ +
‘ marginheight=”0″‘ +
‘ vspace=”0″‘ +
‘ hspace=”0″‘ +
‘ allowtransparency=”true”‘ +
‘ scrolling=”no”>’);
google_write_tracker(d, ad_url, ‘noiframe’);
d.write(‘</iframe>’);
}
}
}

function google_reset_variables(w) {
var nullvalue = null;
w.google_ad_frameborder = nullvalue;
w.google_ad_format = nullvalue;
w.google_page_url = nullvalue;
w.google_language = nullvalue;
w.google_gl = nullvalue;
w.google_country = nullvalue;
w.google_region = nullvalue;
w.google_city = nullvalue;
w.google_hints = nullvalue;
w.google_safe = nullvalue;
w.google_encoding = nullvalue;
w.google_ad_output = nullvalue;
w.google_max_num_ads = nullvalue;
w.google_ad_channel = nullvalue;
w.google_contents = nullvalue;
w.google_alternate_ad_url = nullvalue;
w.google_alternate_color = nullvalue;
w.google_color_bg = nullvalue;
w.google_color_text = nullvalue;
w.google_color_link = nullvalue;
w.google_color_url = nullvalue;
w.google_color_border = nullvalue;
w.google_color_line = nullvalue;
w.google_adtest = nullvalue;
w.google_kw_type = nullvalue;
w.google_kw = nullvalue;
w.google_num_radlinks = nullvalue;
w.google_max_radlink_len = nullvalue;
w.google_rl_filtering = nullvalue;
w.google_rl_mode = nullvalue;
w.google_rt = nullvalue;
w.google_ad_type = nullvalue;
w.google_image_size = nullvalue;
w.google_feedback = nullvalue;
w.google_skip = nullvalue;
w.google_page_location = nullvalue;
w.google_referrer_url = nullvalue;
w.google_ad_region = nullvalue;
w.google_ad_section = nullvalue;
w.google_bid = nullvalue;
w.google_cpa_choice = nullvalue;
}

function google_show_ad() {
var nullvalue = null;
var w = window;
var d = document;
var date = new Date();
var random = date.getTime();
var format = w.google_ad_format;

if (w.google_cpa_choice) {
w.google_ad_url = ‘http://pagead2.googlesyndication.com/cpa/ads?’;
w.google_ad_url += ‘client=’ +
escape(google_modify_client(w.google_ad_client));

google_append_url(‘cpa_choice’, w.google_cpa_choice);
google_append_url_esc(‘format’, format.toLowerCase());

google_get_user_data(w, date);
google_write_iframe(w, d, w.google_ad_url);
google_reset_variables(w);
return;
}

var num_slots_by_client = w.google_num_slots_by_client;
var num_slots_by_channel = w.google_num_slots_by_channel;
var prev_ad_formats = w.google_prev_ad_formats_by_region;

w.onerror = w.google_org_error_handler;

if (w.google_ad_region == nullvalue && w.google_ad_section != nullvalue) {
w.google_ad_region = w.google_ad_section;
}

var region = (w.google_ad_region == nullvalue) ? ” : w.google_ad_region;

var is_zero_ad_format = false;
if (format) {
is_zero_ad_format = ((format).indexOf(‘_0ads’)) > 0;
}

if (is_zero_ad_format) {
if (w.google_num_0ad_slots) {
w.google_num_0ad_slots = w.google_num_0ad_slots + 1;
} else {
w.google_num_0ad_slots = 1;
}

if (w.google_num_0ad_slots > 1) {
return;
}
} else {
if (w.google_num_ad_slots) {
w.google_num_ad_slots = w.google_num_ad_slots + 1;
} else {
w.google_num_ad_slots = 1;
}

if (w.google_num_slots_to_rotate) {
prev_ad_formats[region] = nullvalue;
if (w.google_num_slot_to_show == nullvalue) {
w.google_num_slot_to_show = random % w.google_num_slots_to_rotate + 1;
}
if (w.google_num_slot_to_show != w.google_num_ad_slots) {
return;
}
} else if (w.google_num_ad_slots > 3 && region == ”) {
return;
}
}

w.google_ad_url = ‘http://pagead2.googlesyndication.com/pagead/ads?’;
w.google_ad_url += ‘client=’ +
escape(google_modify_client(w.google_ad_client));
google_append_url(‘dt’, date.getTime());
google_append_url(‘hl’, w.google_language);
if (w.google_country) {
google_append_url(‘gl’, w.google_country);
} else {
google_append_url(‘gl’, w.google_gl);
}
google_append_url(‘gr’, w.google_region);
google_append_url_esc(‘gcs’, w.google_city);
google_append_url_esc(‘hints’, w.google_hints);
google_append_url(‘adsafe’, w.google_safe);
google_append_url(‘oe’, w.google_encoding);
google_append_url(‘lmt’, w.google_last_modified_time);
google_append_url_esc(‘alternate_ad_url’,
w.google_alternate_ad_url);
google_append_url(‘alt_color’, w.google_alternate_color);
google_append_url(“skip”, w.google_skip);

var client = w.google_ad_client;
if (!num_slots_by_client[client]) {
num_slots_by_client[client] = 1;
num_slots_by_client.length += 1;
} else {
num_slots_by_client[client] += 1;
}

if (prev_ad_formats[region]) {
google_append_url_esc(‘prev_fmts’,
prev_ad_formats[region].toLowerCase());
if (num_slots_by_client.length > 1) {
google_append_url(’slot’, num_slots_by_client[client]);
}
}

if (format) {
google_append_url_esc(‘format’, format.toLowerCase());
if (prev_ad_formats[region]) {
prev_ad_formats[region] = prev_ad_formats[region] + ‘,’ + format;
} else {
prev_ad_formats[region] = format;
}
}

google_append_url(‘num_ads’, w.google_max_num_ads);
google_append_url(‘output’, w.google_ad_output);
google_append_url(‘adtest’, w.google_adtest);

if (w.google_ad_channel) {
var chnl = w.google_ad_channel.toLowerCase();
google_append_url_esc(‘channel’, chnl);
var pv_ch = ”;
var arr = chnl.split(‘+’);
for (var i = 0; i < arr.length; i++) {
var ch = arr[i];
if (!num_slots_by_channel[ch]) {
num_slots_by_channel[ch] = 1;
} else {
pv_ch += ch + ‘+’;
}
}
google_append_url_esc(‘pv_ch’, pv_ch);
}

google_append_url_esc(‘url’, w.google_page_url);
google_append_color(‘bg’, w.google_color_bg, random);
google_append_color(‘text’, w.google_color_text, random);
google_append_color(‘link’, w.google_color_link, random);
google_append_color(‘url’, w.google_color_url, random);
google_append_color(‘border’, w.google_color_border, random);
google_append_color(‘line’, w.google_color_line, random);
google_append_url(‘kw_type’, w.google_kw_type);
google_append_url_esc(‘kw’, w.google_kw);
google_append_url_esc(‘contents’, w.google_contents);
google_append_url(‘num_radlinks’, w.google_num_radlinks);
google_append_url(‘max_radlink_len’,
w.google_max_radlink_len);
google_append_url(‘rl_filtering’, w.google_rl_filtering);
google_append_url(‘rl_mode’, w.google_rl_mode);
google_append_url(‘rt’, w.google_rt);
google_append_url(‘ad_type’, w.google_ad_type);
google_append_url(‘image_size’, w.google_image_size);
google_append_url(‘region’, w.google_ad_region);
google_append_url(‘feedback_link’, w.google_feedback);
google_append_url_esc(‘ref’, w.google_referrer_url);
google_append_url_esc(‘loc’, w.google_page_location);
google_append_url(‘bid’, w.google_bid);

if (google_onpage(w, d) && d.body) {
var scr_h = d.body.scrollHeight;
var clt_h = d.body.clientHeight;
if (clt_h && scr_h) {
google_append_url_esc(‘cc’, Math.round(clt_h * 100 / scr_h));
}
}

google_get_user_data(w, date);
google_write_iframe(w, d, w.google_ad_url);
google_reset_variables(w);
}

function google_error_handler(message, url, line) {
google_show_ad();
return true;
}

function google_onpage(w, d) {
return w.top.location == d.location;
}

function google_in_adframe(w, d) {
var documentElement = d.documentElement;

if (google_onpage(w, d)) return false;

if (w.google_ad_width && w.google_ad_height) {
var wd = 1;
var ht = 1;
if (w.innerHeight) {
wd = w.innerWidth;
ht = w.innerHeight;
} else if (documentElement && documentElement.clientHeight) {
wd = documentElement.clientWidth;
ht = documentElement.clientHeight;
} else if (d.body) {
wd = d.body.clientWidth;
ht = d.body.clientHeight;
}

if (ht > 2 * w.google_ad_height || wd > 2 * w.google_ad_width) {
return false;
}
}

return true;
}

function google_init_globals() {
var w = window;
var d = document;
var location = d.location;
var referrer = d.referrer;
var nullvalue = null;

w.google_org_error_handler = w.onerror;
w.onerror = google_error_handler;

if (w.google_ad_frameborder == nullvalue) {
w.google_ad_frameborder = 0;
}

if (w.google_ad_output == nullvalue) {
w.google_ad_output = ‘html’;
}

if (w.google_ad_format == nullvalue && w.google_ad_output == ‘html’) {
w.google_ad_format = w.google_ad_width + ‘x’ + w.google_ad_height;
}

if (w.google_page_url == nullvalue) {
w.google_page_url = referrer;
if (!google_in_adframe(w, d)) {
w.google_page_url = location;
w.google_last_modified_time = Date.parse(d.lastModified) / 1000;
w.google_referrer_url = referrer;
}
} else {
w.google_page_location = referrer;
if (!google_in_adframe(w, d)) {
w.google_page_location = location;
}
}

if (w.google_num_slots_by_channel == nullvalue) {
w.google_num_slots_by_channel = new Array();
}

if (w.google_num_slots_by_client == nullvalue) {
w.google_num_slots_by_client = new Array();
}

if (w.google_prev_ad_formats_by_region == nullvalue) {
w.google_prev_ad_formats_by_region = new Array();
}
}

google_init_globals();
google_show_ad();
})( )