Leucauge is a genus within the family Tetragnathidae (Long-jawed Orbweavers).
When disturbed they will stretch their front legs forward and the others in the other direction, thus being able to hide on blades of grass or similar elongated substrates.

This is possibly Leucauge blanda, but I am not sure.

Sarinbuana Eco Lodge, Mount Batukaru Area, Bali, Indonesia, 18 October 2011