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Calling CGI.pm Methods

CGI.pm methods often accept many (optional) parameters.

Special method-call syntax available throughout CGI.pm: 

MethodName(-ArgName1=>Value1,
           -ArgName2=>Value2,
           -ArgName3=>Value3,
           ...
           -ArgNamen=>Valuen,
           );

Example: 

print header(-type=>'image/gif',-expires=>'+3d');

Argument names are case-insensitive; args can be supplied in any order.