It will happen quite often. Every developer experiences the same.

If you are only developing and display on your local machine, it is easy. The followings would be I do in that order.

1) Refresh, of course
2) Go to IE explorer properties dialog, delete all offline files, your problem is solved.

If you upload your code on a server, then access the website, then you need to play cat and mouse games with them. Try let the proxy server know your page need to be updated. Do the same 2 items as on your local machine, if it does not work, the do the followings:

1) Temporaly rename your page to something else, and access the "new" page.
2) Shutdown my website for a minute, and access it, the proxy will give me 404. Then restart.
3) Other people might have some more creative way, let me know!!!

新开一个IE窗口