creating links to a pdf file
The text pasted below comes directly from www.adobe.com/support/techdocs/317300.html and you should refer to that page for instructions and updates. We have simply pasted a snapshot below to preserve it, in case the Adobe page moves.
Link from an HTML page to a specific page in PDF file (Acrobat 7.x, Acrobat 3D)
What's covered
Open a PDF file to a specific page
Open a PDF file to a set destination
HTML pages can contain links that open PDF files within a web browser by using an Adobe Acrobat product (Adobe Acrobat Professional or Standard, Adobe Acrobat 3D, or Adobe Reader) plug-in that is installed into supported versions of Netscape Navigator, Mozilla Firefox, Microsoft Internet Explorer or Safari (Mac OS). When you open a PDF file within a web browser, the first page of the PDF file will be shown by default. You can add a string into the HTML link so a PDF file opens and jumps to a specified page or set destination. To use either of these two methods, do the following:
Open a PDF file to a specific page
To target an HTML link to a specific page in a PDF file, add #page=[ page number ] to the end of the link's URL.
For example, this HTML tag opens page 4 of a PDF file named myfile.pdf:
<A HREF=" http://www.example.com/myfile.pdf#page=4 " >
Note: If you use URLs other than HTTP and HTTPS, such as server locations (\\servername\folder), then set the link to open to a set destination using the procedure in the following section.
Open a PDF file to a set destination
A destination is the end point of a link represented by text in the Destinations tab. Destinations enable you to set navigation paths across a collection of Adobe PDF documents. Linking to a destination is recommended when linking across documents because, unlike a link to a page, a link to a destination is not affected by the addition or deletion of pages within the target document.
To set a Destination in Acrobat 7.0 (Professional or Standard):
1. Set the Zoom and page location to the way you want it on the screen.
2. Select View > Navigation Tabs > Destinations to open the Destinations tab.
3. Select Options > New Destination from the Destinations tab.
4. Give the Destination a name.
5. Create an HTML link that points to this destination by adding #[ destination name ] to the end of the links URL.
For example, this HTML tag opens a destination named "glossary" in a PDF file named myfile.pdf:
<A HREF=" http://www.example.com/myfile.pdf#glossary ">
For more information about destinations, please see the Complete Acrobat 7.0 Help (open Acrobat, choose Help > Complete Acrobat 7.0 Help) and choose the Destinations section under the Index tab. Also, see http://partners.adobe.com/public/developer/en/acrobat/PDFOpenParameters.pdf .

