This maybe should go into a different forum, such as Programming.
The standard directory to place images within in an HTML page is images
. In fact, you do not need the text "http://www.linuxquestions.org/questions/images/" before each filename in the src= parts of the attribute.
<img src="headandshoulders.jpg" />
will work fine. Yes it does seem counter-intuitive in that it appears legal to use your first notation because you selected a sub-directory called "fotos"; however I've not had success using alternate sub-directory names either, I've always had to use "images".
I'm sure there are more detailed references, this is just a known thing to me but I searched a little for a reference that explains this http://www.htmlgoodies.com/primers/h...le.php/3478181
in the paragraph where it says "Placing An Image On Your Page".
Also, since I learned HTML by the seat of my pants and not via formal training, my answer is colored by trial and error based experience versus some substantive knowledge of the development of the language.