Executing JavaScript in Selenium

http://www.guru99.com/execute-javascript-selenium-webdriver.html

https://www.mkyong.com/selenium/how-to-execute-javascript-in-selenium-webdriver/

http://toolsqa.com/selenium-webdriver/javascript-and-selenium-javascriptexecutor/

http://www.ufthelp.com/2014/11/what-is-javascriptexecutor-in-selenium.html

https://examples.javacodegeeks.com/enterprise-java/selenium/selenium-javascriptexecutor-tutorial/