CSS Classes vs ID

The W3C defines class ID as "a unique identifier to an element"
Standards specify that any given id name can only be referenced once within a page or document. From our experience, IDs are most commonly used correctly in CSS layouts. This makes sense because there are usually only one menu per page, one banner, and usually only one content pane.

Vezi poate ai uitat atunci cand ai pus in loc de id class, sa modifici in fisierul .css din #headermenu in .headermenu. Nu ar trebui sa aibe nici o importanta daca sunt clase sau id-uri.


In fine, succes.

p.s.: de ce nu bagi width="20%" si height:7px; direct in id-ul sau clasa din fisierul .css ?