No Right Click Codes:

Lissa Explains it All: No Right Click Script (http://www.lissaexplains.com/javascript6.shtml#noclick)
Dynamic Drive: Script with Pop-Up Alert (http://www.dynamicdrive.com/dynamicindex9/noright.htm)
Dynamic Drive: Script with no Pop-Up Alert (http://www.dynamicdrive.com/dynamicindex9/noright3.htm)
Dynamic Drive: Script for Images (http://www.dynamicdrive.com/dynamicindex9/noright2.htm)
Dynamic Drive: Script with Customized Context Menu (http://www.dynamicdrive.com/dynamicindex1/contextmenu.htm)

Source Code Encrypter:

Dynamic Drive: Source Code Encrypter (http://www.dynamicdrive.com/dynamicindex9/encrypter.htm)

Disable Highlighting:

Dynamic Drive: Script to Disable Highlighting (http://www.dynamicdrive.com/dynamicindex9/noselect.htm)

These are not foolproof ways of keeping people out of your code, they are only to make it a bit more difficult for them to get in :) It is possible for anyone to just view your code by the View>Page Source in a browser, so remember that there is no way to remove this button from the toolbar either.