just now I realized that the link <a href="../cat_select.asp?showtype=byitemgroup&itemgroup=Book s&job10=new">Books</a>
should be
<a href="cat_select.asp?showtype=byitemgroup&itemgrou p=Books&job10=new">Books</a>

and this is how it is in the original file.
When copying the files the links are automatically updated ? (because I didn't change this file)