conversion of anchor elements into strings fixed

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8969 5f5364db-9458-4db8-a492-e30667be6df6
Do not change the active element when the content of an iframe was changed.
Issue 1568


git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8970 5f5364db-9458-4db8-a492-e30667be6df6
tests migrated to webdriver

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8971 5f5364db-9458-4db8-a492-e30667be6df6
code style fix

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8972 5f5364db-9458-4db8-a492-e30667be6df6