Tips and Tricks

I've seen some tips on determining what browser the client is using (i.e. parsing the HTTP_USER_AGENT), but I would like to see some information on determining the capabilities available to the browser using PHP. Specifically, whether the client browser has javascript enabled or disabled, and what plug-ins are installed on the browser (such as Flash, Adobe Acrobat Reader, RealPlayer, etc.). This would allow me to customize the HTML sent to the client. The only alternative, which doesn't use PHP and I haven't tested, would be somthing like: <SCRIPT LANGUAGE="javascript"> function popup(url) { POPUPwindow = window.open(url, "popup", "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,r esizable=no,width=440,height=225,left=10,right=10"); POPUPwindow.focus(); } print "<A HREF=javascript.popup(new_url)>popup_window</A>\n"; </SCRIPT> <NOSCRIPT> <A HREF=new_url>popup_window</A> </NOSCRIPT> Thanks in advance Adriano de la Cruz adriano@pogocorp.com