running a batch file in loop

i have a batch file which should run every five min...for an hour
can any one help me out

You have crontab for that.. Check it.. Sample entry is

 /5 * * * * yourCommandFile.ksh

By the way /5 means every 5 mins, other wise you can add 00, 05, 10, 15, 20, 25, 30, 35, 40 , 45, 50, 55 * * * * yourCommandFile.ksh