Q1 code like this...

@sorted = sort { "$SCALAR{$a}[0] $SCALAR{$a}[1]" cmp "$SCALAR{$b}[0] $
+SCALAR{$b}[1]" } keys %SCALAR;
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Q2 yes, there are ways... the way I commonly do it is put something in the url, like a link count, so if a page's link count is 5, all of your links will contain 6... if you see a number less than 6, then they have reloaded or gone back or bookmarked or something. There are other ways, but this may give you an idea :)

                - Ant
                - Some of my best work - Fish Dinner