Security Issues with Copying and Pasting

By default, JavaScript is not allowed to read or set your clipboard data for security and privacy reasons. This is because websites scripts can erase and replace what you currently have in your clipboard and they can read whatever you have in your clipboard (security and privacy issue); as such, you should grant access with caution. There are, however, instances when you might want to bypass this restriction for certain sites. Rich text editors such as the one on 350pages often require access to the clipboard to use copy/paste functions. Other sites may copy useful information to the clipboard for the user to paste elsewhere.

For Internet Explorer, there is a setting under the Tools menu in Internet Options under the Privacy tab that will allow you to turn copy and paste in the Rich Text Editor on. Click on Custom Level and scroll down the list options until you find one titled "Allow Paste Operations Via Script". Make sure this is set to enabled, then click OK and then Apply.

In Firefox, instead of manually setting preferences, the AllowClipboard Helper extension manages security policies with a convenient user interface. You can download it here.