This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Actually, this can be done. The problem is that it involves exploiting security vulnerabilities, which are subject to radical change from browser to browser, version to version. It also raises some legal concerns.