User-Agent: Googlebot
Disallow: /index.html
Disallow: /1.html
Disallow: /2.html
Disallow: /itassistant4u/
You can, of course, put multiple User-Agent statements in the same robots.txt file. Hence, to tell AltaVista not to spider the file named myfile1.html, and to tell Google not to spider the files myfile2.html and myfile3.html, you would write
User-Agent: Scooter
Disallow: /index.html
Disallow: /1.html
Disallow: /2.html
Disallow: /itassistant4u/