Tree checkbox

[liuqiyu]

how can i make it when I click the checkbox of the tree node, then make the parent node(unckeck before) checked ?
I write "parentNode.attributes.checked=true" but it not work. Help

[liuqiyu]

i got it ,parentNode.ui.checkbox.checked = true;

[playadata]

how about if you have a parent and leaves, check the parent, all leaves get checked. uncheck the parent, all leaves unchecked. check a subset of leaves and parent is a greyed out check (CSS control).