easyui tree expand to second level

eayui tree  collapse, and expand to second level

$(‘#orgTree’).tree({
onClick: function(node){
$(‘#dg’).datagrid(‘reload’,{
“qo[‘q_org’]”:node.id
});
},
onLoadSuccess: function(node, data){
$(‘#orgTree’).tree(‘collapseAll’);
var root = $(‘#orgTree’).tree(‘getRoot’);
$(‘#orgTree’).tree(‘expand’,root.target);
}
});

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