Setting Response.Expires to a negative number or 0 disables caching. Sometimes, the use of Response.Expires = -1 doesn’t work because of mismatches between the clocks on the server and the browsers. Be sure to use a large negative number, a little more than a day (1440), to work around those mismatches.
Example:
Response.Expire = -1441
size=3>
Here are the commands to place at the top of your ASP scripts, to ensure that the page is not cached: size=3>