I have a client who uses Opera. Every time I update her homepage her browser still shows the old cached version. This does not happen with my IE or FireFox. Does anyone know some code that will tell Opera to check for updated versions? Iím looking to set things up to force the browser to check because I canít teach everyone who looks at this site how to set their browser preferences.
If you are using static pages then the server will automatically configure the caching for the page in relation to the last modified date on the file - so if you leave the page unchanged for four weeks, many servers will instruct caches and browsers to keep a copy of the page for an amount of time which will vary between several hours and several days.
How to set up caching depends on your server software. Are you running Apache, IIS or something different?