For Internet Explorer users:
Click the Start button
Select Settings and then click Control Panel
Double-click Internet (or Internet Options) button, and select the General tab
Click the Settings button in the Temporary Internet Files section and choose View Files
Click Edit and choose Select All
Press the Delete key on your keyboard. If prompted to verify that you want to delete your cookies, click Yes
For Netscape users:
Computers store copies of frequently accessed web pages in the system's memory cache or disk cache.
This way, the computer doesn't have to download the web page each time you access it.
To change the size of the memory cache or clear it altogether (Windows and Unix only), follow these steps:
From the Edit menu, choose Preferences
Open the Advanced category and click Cache
To clear the Memory Cache immediately, click Clear Memory Cache