Re-center map on supplied XY

[Chip Taylor]

I have a map with no scripting (all CGI-based with HTML) that I'd like to
provide a way for the user to enter a longitude and latitude in text boxes,
hit submit, and recenter the map with current layers, size, etc on the
supplied latitude and longitude.  I know that the CGI passes the variables
mapx and mapy that tells you where the current map is centered, but if I
create a textboxes with id's and names of mapx and mapy, after these are
filled in with the desired values and the form is submitted the map is not
centered on these coordinates.  What am I doing wrong?  Is what I want
possible?

Chip Taylor
Prepared Response, Inc. 
1127 Broadway Plaza, Suite 204
Tacoma, WA  98402
O 253.272.1730
M 253.948.2525
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