running shell script in ubuntu

I got a script from http://ruslug.rutgers.edu/~mcgrof/grub-images/checksplash.sh to check the splah support of my GRUB .But i dont know how to run it.I asked it at the ubuntu india mailing list then i got the respnse as to use
sudo chkmod 777 checksplash.sh
./checksplash

it worked