Greetings.
I'm not even sure if this should be here, because I don't think this is possible without Javascript... I may be wrong though.

My website has an header. A field of the header has an image. What I'm trying to do is that the image displayed there varies. That is, the image there would rotate (or maybe be random) from a serie of other images (all the images would have the same size).

How can I do this?

Thanks.

You can do it with java, cgi, or php.

You might be able to do it with server parsed html pages but I can't figure out how.

If there is some trick for doing it with html, I have never heard of it.

You can't do it with HTML, you do have to use scripting. Javascript is probably the easiest and quickest method and there are tons of random image scripts out there.

Yeah, that's what I thought. I'll use Javascript.

You could do it with SSI, basing the picture to be displayed on the second, minute or hour, or all, that the page is loaded.

http://www.bignosebird.com/sdocs/echo.shtml
http://www.bignosebird.com/sdocs/browser.shtml

Combining those two should set you on the right track, should you prefer not to use any of the other methods.

The difference between javascript and asp/php is whether the code runs in the browser, or at the server. JS will put less strain on your server and keep your site running faster as you scale up, but may become a limiting factor down the line, if you want this stuff served up from a database and with logging and whatnot. You might be able to upgrade your javascript to ajax and not have to change much, if you ever get to that point.

So I guess that's another vote for javascript, if there isn't any strong reason you need server-side functionality. And it doesn't sound like it.

I always use php and mysql to do any randomize stuff but if javascript is what you know then that will work!