Expand APEX tree after page load

This little snippet of code will expand the APEX tree:

$("input:[value='Expand All']").click();

This solutions finds the HTML objects by the displayed value. Use it in a "Dynamic Action > Page Load > Execute Javascript" process.

In case you use multi language applications then this solution will fit better:
http://apextips.blogspot.de/2011/03/expand-and-collapse-all-tree-nodes.html