Auto populate an HTML form with LC server

[Tim Selander]

Many web forms in Japan automatically fill in prefecture, town, 
ward and block when you just put in the zip code. I would like to 
do that on my web site, and know the api I would use.

I assume these sites are using javascript, but can LC server pick 
up user input before the submit button is clicked?

Any help appreciated.

Tim Selander
Tokyo, Japan