I'm new to .asp and I see lots of sites that when clicked on a link... the url goes from www.domainname.com to www.domainname.com/index.asp?SID=58. Click on another page it will say www.domainname.com/index.asp?SID=77. Basically what is the whole 'index.asp?=#' way of linking? Where can I read about it and why are so many websites using this? Is it pulling text from a mysql table? Is this some sort of online, live template?

Just thought I would hurry up and catch up with the times.

Thanks.

just pulling data fron a database and the querystring tells the script which item to pull from the DB. There will be some code that captures the ID No and does the processing

ie

<%
Prod_id = cint(request.querystring("SID"))
strSQL = "SELECT fields FROM table WHERE id = " & Prod_id & ";"
' rest of code  
%>

some ASP db samples at ASP101