1 onExpand:function(node,param){
 2             $(this).children("li").each(function(){
 3                 if($(this).children("ul").length>0){
 4                     $(this).children("ul").hide();
 5                     $(this).children("div.tree-node").find(".tree-hit").addClass("tree-collapsed").removeClass("tree-expanded");
 6                     $(this).children("div.tree-node").find(".tree-icon").removeClass("tree-folder-open");
 7                     if($(this).children("div.tree-node").find(".tree-title").text()==node.text){
 8                         $(this).children("ul").show();
 9                         $(this).children("ul").css({'position':'absolute','top':'20px','left':'60px','width':'300px','height':'650px','overflow-y':'auto'})
10                         $(this).children("div.tree-node").find(".tree-hit").addClass("tree-expanded").removeClass("tree-collapsed");
11                         $(this).children("div.tree-node").find(".tree-icon").addClass("tree-folder-open");
12                     }
13                 }
14             });
15 }

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