Passing arguments to Grads script

[Daniel Leins]

All,
I have written a script to plot temperatures across a given area.  When it
comes to titling the images, I would like to pass the current time to the
script, then have this argument displayed through 'draw title'.  For example,

If it is 15:00, I would like to pass the time to my script, and do something
like

draw title Current Temperatures as of @ARGV[0]

where @ARGV[0] comes from gradsdods -l -b -c "run temps.gs 15:00"

(i am aware that @ARGV[0] is not correct, I am simply using this syntax as
an example).

OR

If I wanted to pass the title itself to the script instead of the time, for
example:

draw title @ARGV[0]

where @ARGV[0] comes from gradsdods -l -b -c "run temps.gs Dewpoints"

I've looked through several scripts online which involve passed arguments,
however I haven't been able to find anything that pertains to this.  I don't
need to perform any sort of calculations on the passed argument, I simply
need to pass it into the script, and have it passed back out in the title
section.  What is the best way to accomplish this?

Thanks,

Dan Leins
DOC/NOAA/NWS/EAX