1939 Replace Title Script

We have about 1000 html pages with identical title tags. We need to change these so each title pulls information from the same line on each page. We also want to insert random keywords into the title so they are all different. The script should allow us to select a line from the page and it will use that text and insert it into the title. We should also be able to save a keyword text file and the script will pull random words from the text file and insert them into the title tags. A demo is required prior to payment. Thanks