st: using current_ time to manage the log file

["G. Dai" <dgecon@gmail.com>]

hi all,
I find it is difficult to trace back my research by looking at the log
files. Ideally, I'd like to name the
log file with the time the do file executes, e.g., the log file is
named as "10_25_7_July_2010" where 10_25 is the
time and 7_July is the date.
with this in mind, I'd like to  use
***************begin ******
log using "/.............../"`c(current_time)'_`c(current_date)'.smcl", replace;
**********end********
but failed because current_time have punctuation marks like ":" which
can't be included in a file name.

how you guys solve this problem?
thanks,
Guang
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/