using variables in bat

I am trying to create a bat which opens log file to notepad.

Logfile is named by date ddmmyyyy.log

var d;
d= "13052004"
notepad "Path\" + d + ".log"

while executing, bat does not understand my variable d.

Can anyone help me with this?

-Jan

Exaples of how to do this using batch files can be found at the following links:

http://www.computerhope.com/batch.htm
http://www.comp-air.com/vfrazee/batch/

Or try a Google search for 'DOS batch files'