fddf3d51_S5__7_0__Object_Model_JS__Cell__Property
[Type] Swatch [Access] r/w [Description] The swatch (color, gradient, tint, or mixed ink) applied to the gap of the top edge border stroke. Note: Not valid when top edge stroke type is solid. [Property] 
topEdgeStrokeGapColor
Adobe InDesign CS5 (7.0) Object Model JS: Cell
Property