Question : creating multiple instances of user data type

DECLARE
   TYPE abc IS TABLE OF NUMBER;
   a123        abc;
   b123        abc;
   c123         abc;
   d123        abc;

is the above proper syntax to create unlimited amount of instances of a user defined data type?

thanks

Answer : creating multiple instances of user data type

Ok for a start the best tool that I use is Firebug to work out sizes and positions of modules/images/divs etc
http://www.rockettheme.com/forum/index.php?f=288&t=31460&rb_v=viewtopic

This is a tutorial from rockettheme on how to use it.