To copy any text of a webpage, even if it has HTML/JAVA turned on, simply press Ctrl + U to view the source. If the buttons are disabled, go to View > View Source.
Keep in mind that if the website has all the content encrypted in Java, copying won't be possible. Instead, go to File > Save web page. After it's loaded, open the folder with the files and delete the JS items. Load the HTML and the text should be available for copying.