how to clear html cache

I had a website which has some html files and they are always getting cached in browser. I added below lines but not working as expected

<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">

I tested in internet explorer 9 by enabling cache-> always refresh from server option and then it's fetching fresh copy of html from server but in other browser's like chrome and opera it's caching every time. P开发者_JAVA技巧lease let me know how to prevent this cache issue.

Regards, Sukumar

<META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">

<META HTTP-EQUIV="EXPIRES" CONTENT="-1">

Check http://support.microsoft.com/kb/234067