Hi Max87,
many thanks for your answer, I appreciate!
A few minutes ago I found my mistake… In fact the first line
var mySource = $('#m1-FCD_Team1ereContingentPlayer-Image_Player').attr('src');
was followed by this one
var posOfUSChar = mySource.indeOf('_');
When executing the code the debugger indicates
“Result of expression ‘mySource.indeOf’ [undefined] is not a function.” and I thought [undefined] was due to “mySource”.
As I was really tired I did not pay attention to the real mistake : mySource.indexOf(‘_’); (“x” was missing)
I also had problems because my pictures were in /images of main screen and not in /images of my second screen (called by main one)… and I was testing only the second screen (.mobi).
With all those bugs fixed I can now read the index of my pages (second question I had) and then increase/decrease them as requested!!
I quiet new with Javascript and I will continue to sweat!
Once again many thanks for your time!