Response is a defined object in VBScript. Clear and Redirect are member functions. It will never be seen at the browser end. ASP is actually very fast at executing this code. The first Response.
True line turns on the buffering behavior.
This bit of code can be added to the beginning of every page you want to protect. Create an ASP page called authenticate.asp so we'll have it available to use. Let's just get our Form variables across. Create a form on login.htm with a blank for the user ID and a blank for the password. If you've never created an HTML form before, now is a good time to learn.