The FileExists method checks the existence of a file. It returns –1 if the specified URL exists within a published directory. If the file does not exist, it returns 0. FileExists only checks the existence of files published on your site. Therefore, it takes a relative URL rather than an absolute URL.
oTools.FileExists(URL)
The following example demonstrates using the FileExists property to create a link if a particular file is present.
--- Tools_FileExists.asp ---
<%
Set oTools = Server.CreateObject("MSWC.Tools")
If oTools.FileExists("/win2000.gif") then
%>
<p>
<a href="http://www.microsoft.com/windows2000/guide/professional/overview/">
<img src="/win2000.gif">
</a>
<%
End If
%>