Using <base href>

The answer was to use <base href>. This tells the browser what URL relative links are relative to. So if I use:

<base href="http://CoverYourASP.com/"> <a href="Hello.asp">Say hello</a>

The link would always point to http://CoverYourASP.com/Hello.asp, no matter where this page was.

Configuring <base href>

Of course, hard-coding http://CoverYourASP.com/ into my code wouldn't help you or I very much. The <base href> needs to change when it's on the development server - in my case I want it to be http://localhost/cya/.

This is accomplished with some code in utils/Init.asp, shown below:

var sServer = '' + Request.ServerVariables ( 'SERVER_NAME' ); // if running securely, use https:// var sRoot = '' + Request.ServerVariables ( 'HTTPS' ); var sBaseServer = 'http' + ( sRoot == 'on' ? 's' : '' ) + '://' + sServer; // if running on non-standard port, use it var nPort = Request.ServerVariables ( 'SERVER_PORT' ) - 0; if ( nPort != 80 )    sBaseServer += ':' + nPort; // test which URL I am running from for ( var i=0; i<sURLTest.length; i++ ) {    if ( -1 != sBaseServer.indexOf ( sURLTest [ i ] ) )    {       // apply the offset if one given       if ( sURLOffset [ i ].length )          sBaseServer += '/' + sURLOffset [ i ];       break;    } } Out ( '<base href="' + sBaseServer + '/" target="_top">' );

To start with I get the server name from Request.ServerVariables. Giving my servers as an example, I get either "CoverYourASP.com" or "localhost" from this.

I then test to see if the page was requested with SSL security, and if so use https:// instead of http://

If the page was accessed using a different port (not the default port 80) then that is appended too.

Part 3: The sURLTest array...