1. Open the HTML document in a text editor.
2. Browse through the available code and look for a Javascript code that begins with '
.' If you find the Javascript snippet, then move to the second line of the code.
3. Locate the 'google_ad_client' variable, usually located on the second line of the AdSense code. If you found it, then you are looking at the AdSense account code. The 'google_ad_client' lists the publisher ID, which is unique to each AdSense account.
4. Locate the 'google_ad_slot' variable. it is the unique reference number for the specific ad slot the publisher has set up.
5. Find the 'google_ad_width' and 'google_ad_height' variables. These numbers indicate how tall and wide the ad display is.