From http://www.w3schools.com (Copyright Refsnes Data)

ASP Execute Method

The Execute method executes an ASP file from inside another ASP file. After executing the called .asp file, the control is returned to the original .asp file.

Syntax

Server.Execute(path)

Parameter	Description
path	Required. The location of the ASP file to execute

Example

File1.asp:

<%
response.write("I am in File 1!<br />")
Server.Execute("file2.asp")
response.write("I am back in File 1!")
%>

File2.asp:

<%
response.write("I am in File 2!<br />")
%>

Output:

I am in File 1!
I am in File 2!
I am back in File 1!

Also look at the Server.Transfer method to see the difference between the Server.Execute and Server.Transfer methods.

Complete Server Object Reference