I want to create a simple visitor counter for a webpage. I am using seamonkey composer. How can i write this myself - and what are the constraints (does it have to be javascript or html)?

Can someone please tell me how to do it because i have not done anything like this before.
thanks

Seamonkey composer alone cannot do this. You need non-volatile storage of the count on the server, and Seamonkey composer cannot generate this. You need a CGI component that runs on the server.
I guess either this is homework, or you haven't discovered the legions of good arguments that such counters are relatively meaningless anyway.
--- rod.

it might be useless - but its a nice touch.

Useless and meaningless are not the same in this context. I can see where it may be quite useful to count hits, however one cannot accurately count hits by simply counting the number of times an HTTP request is received by a server. In this context, I refer to a 'hit' as someone deliberately clicking on a link or entering the URL in the address bar of a browser or some equivalent. The number of caches and proxies along the way will significantly reduce the number of requests that actually reach your server. The number of requests that reach your server can be seen as a minimum number of hits, although it may also be artificially high if people reload the page at unusual rates. Mainly, don't people nowadays find hit counters displayed on a page a bit dorky? If you really want to collect statistics for your own benefit, it is probably better to use the server log files.
--- rod.