A capybara driver that uses WebKit via QtWebKit. Qt Dependency and Installation Issues capybara-webkit depends on a WebKit implementation from Qt, a cross-platform development toolkit. You‘ll need to download the Qt libraries to build and install the gem. You can find instructions for downloading and installing QT on the capybara-webkit wiki. capybara-webkit requires Qt version 4.8. Windows Support Currently 32-bit Windows will compile capybara-webkit. Support for Windows is provided by the open source community and Windows related issues should be posted to Stack Overflow.
DOM Mouse-Over Element Selection And Isolation | DZone
DOM Mouse-Over Element Selection And Isolation
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原文：http://www.cnblogs.com/lexus/p/3598643.html