Here are the osmosis and diffusion website links:

1^st site:  http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP1903

2^nd site: http://www.wiley.com/legacy/college/boyer/0470003790/animations/membrane_transport/membrane_transport.htm

3^rd site:  http://zoology.okstate.edu/zoo_lrc/biol1114/tutorials/Flash/Osmosis_Animation.htm

4^th site:     http://www.biology.emory.edu/multimedia/animation/blast!/osmosis.swf