Need to hide a subform dynamically

Hi,

I have  a subform with name formz007 with only one field.

This subform is binded to table data and the field is binded to the field of table data.

Repeat subform with min 1 is applied to subform.

I need to hide the subform when the table data is empty.

Please provide me the java script or form calc and the event in which I need to write.

I tried all the ways but I'm helpless.