Is there a current web API for reading and writing nvram variables via the webserver?

I'm looking at the asp_handler.h, and I'm guessing that each line in asp_handler.h is an index that corralates to a values specified in the HTML to fill in, for example.

index 12 is  {"nvram_get(\"wan_proto\");", NULL},)

to fill this value from nvram in the html you would:

<INPUT name=wan_proto type=hidden value= "<%12%>">

I see some form targets are things like "ether.cgi" but I cannot seem to find were these are generated or how to make my own.

So having said all that, now can I manipulate my own variables using this interface?  Also controling reboot would be good.

Thanks,

M