Brilliant framework!

Anyway - moving along...
I have a tree panel. When u click on the left node of the tree panel it opens a window.
That window has a panel that loads its content via ajax. If i close the window (win.hide) and click a leaf node link again from the tree panel the same window appears. How can i force it to load the contents on the window each time?

I tried win.close but that gave me errors.

Please please... any help would be appreciated.
Thanks guys + gals!

see code below:

Ext.onReady(function() {
var Tree = Ext.tree;
var win;

var tree = new Tree.TreePanel({
useArrows: true,
autoScroll: true,
animate: true,
enableDD: true,
containerScroll: true,
border: false,
loader: new Tree.TreeLoader({ dataUrl: 'reorder.aspx' }),

root: {
nodeType: 'async',
text: 'REPORT HOME',
draggable: false,
id: '_root'
},

listeners: {
click: function(n) {
var id = n.attributes.id;
var txt = n.attributes.text;

var nav = new Ext.Panel({
height: 40,
region: 'north',
split: true,
margins: '3 3 3 3',
cmargins: '3 3 3 3',
html: getDataInfo()
});
var nav2 = new Ext.Panel({
id: 'panel_boo',
header: false,
height: 30,
region: 'center',
autoLoad: {
url: 'reorder_fileInfo.aspx',
scripts: true,
params: "url=" + id + "&act=view&usr=lhendricks"
},
margins: '3 3 3 3',
cmargins: '3 3 3 3'
});

//POP THE WINDOW THAT SHOWS ALL DETAILS OF THIS FILE.......................
Ext.Msg.alert('pop', 'before WIN');
if (!win) {
Ext.Msg.alert('pop', 'after WIN');
win = new Ext.Window({
applyTo: 'hello-win',
layout: 'border',
width: 500,
height: 300,
closeAction: 'hide',
plain: true,

items: [nav2, nav],

buttons: [{
text: 'View this report',
width: 130,
handler: function() {
handleBtn(id, txt);
}
}, {
text: 'Close',
handler: function() {
win.hide();
}
}]
});
}
else {
Ext.Msg.alert('pop', 'doLayout');
//var w = Ext.get('panel_boo');
win.doLayout(true);
}
win.show(this);
}
}
});

tree.render('tree-div');
tree.getRootNode().expand();

function handleBtn(id, txt) {
Ext.Msg.alert('heehaa', 'btn clicked');
}
});

function getDataInfo() {
return "some information to be placed here...";
}