The speed of the animation is dictated by the number of frames the animation takes...  so if you say you have 10 frames in your animation if the size if large, this will apper fast... however if the area collapsed is small it will look slower..   currently the tree control has no property to allow this number to be changed.. therefore it uses the default defined in the dnn.js file.

dnn_dom.prototype.collapseElement = function (oCtl, iNum, pCallBack)

{

if (iNum == null)

iNum = 10;

dnn_dom.prototype.expandElement = function (oCtl, iNum, pCallBack)

{

if (iNum == null)

iNum = 10;