Note:
Returns an array of all block formats available in the Dialog Helper object.
The blockFormats collection has the Count property instead of the common length property.
Its syntax is document.all.dialogHelperID.blockFormats.Count = integer.
Syntax:
dialogHelperName.blockFormats // returns all block formats
dialogHelperName.blockFormats(param1) // returns an individual block format
param1 Required; the zero-based index