Set the number of lines allowed in multi-line text field

Hi,
I am designing a form where I have some multi-line text fields where I only want the user to be able to enter a maximum of say 5 lines. I know I could do this by enabling the "Limit Length to Visible Area" option, however, this option is ignored by Reader 7 and the field scrolls, hiding any text that spills beyond the visible area from printouts. It works great in 8 though. To avoid this bug/feature in Reader 7, is there some script that I can use to limit the number of lines allowed in a text field?
Thanks

I ran into similar issues switching between Acrobat/Reader. Here is the prominent code that works for me when I use this in "Enter" event of the textField.
var aSOM=this.somExpression.substr(15,this.somExpression.length - 1);
var acroField = event.target.getField(aSOM);
acroField.doNotScroll = true;
I chose Allow Multiple Lines alone and noting else.
Good Luck,
SekharN

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Set the number of lines allowed in multi-line text field

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