Simple Script To Copy Text from a Webpage

I need a very simple script that will copy text from a webpage. It is a private membership site so the script should be able to see the source code of the current page im viewing in internet explorer/firefox (you can program it to work on either one). It should scan through the source code of the page im viewing and search for <textarea name="texttocopy1"> CONTENT <td> and the script will copy the text found in CONTENT and save it as a txt file automatically into a folder. Whenever i refresh the page a new CONTENT will be generated. So I need the software to be able to refresh my current webpage in my browser and then automatically grab the CONTENT. Then refresh again and grab new CONTENT.