I have AdSense code over a couple years ago I saved in NotePad for a 728 pix wide banner and have used that same code in new sites / pages I have launched. What about that line in the code: google_ad_channel =""; I can just delete it and save the page and then republish it . . . right?
Actually the code for the 728 pix wide banner is easier because all I need to do is open Notepad & there it is....right click & copy the code and paste it where ever I want without going into AdSense set up and picking out all that stuff etc.