Vertical Scroll bar In List Item

Dear All:
I have to fill up list box with 100 values and i want to see only 4 values at a time,next 4 values should be shown by scrolling down vartical scroll bar.(The same functionality as we usually see in web pages' list box)
I shall be very thankfull to u for any kind of help
Regards
Sam

Thanks for reply
Please let me know if i use FORM 9i then how can i do this task bcoz i didn't find such property like scroll bar ver in FORM 9i
Regards
Sam

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