I said that when you asked me what I wanted to do. The first question was about an image, because I planed to monitor the change in the page, with a "wait 5 sec" (recaptcha), and compare a picture of the page before and after. You asked me more precision when you tried to help me.
In this exemple, I have to detect when there is a new item added in the page, but I can't copy paste all the page and compare, because there is timers on each item, "last seen 5 minutes ago", and the macro will detect a change that I don't need.
Anyway thank you for your help...