Detecting toolbars?

Used for statistical info.

[activeco]

I am aware of scripts detecting G toolbar, but is there anything serverside for that purpose?
What about Y! toolbar?

[webnoob]

i don't see how the toolbar can be detected since the only thing the browser sends to the server is the Agent string which can be manipulated.

[activeco]

Have I understood you well?
Out of all environment variables that you can ask, it is only the user agent string that is returned to the server?

[webnoob]

yes, the only thing you can tell is the browser and version they are using. that is all that is sent to the server.

i don't see how it would be possible to tell if the browser has plugins (toolbar) installed.

[activeco]

Could anyone provide php or asp script for this?

[activeco]

Just found this below.
Would it be possible to get JS object../classid="clsid:00EF2092... and to do further php executions on the server side?
Obviously JS would be still needed.
Anyone familiar with JPSpan?

"JPSpan provides tools to “hook up” PHP and Javascript, for the purpose of fetching data from PHP into a web page which has already loaded, without reloading the entire page.

The objective is to make connecting a Javascript client with a PHP server as painless and error-free as possible. To this end JPSpan allows you to define a class in PHP and call it’s methods directly (and remotely) from Javascript. "