Below code displays the tree structure.When i click on the image Pic.gif,it has to get replaced by new image.Similarly pic1.gif to new image,pic6.gif to new image.Can you help mw with the code where exactly it fits in this code ????

var children = [{
    text: 'family',
    icon: 'pic1.gif',
    children: [{
        text: 'parent1',
        icon: 'pic2.gif',
        children: [{
            icon: 'pic3.gif',
            text: 'children1',
            leaf: true},
        {
            icon: 'pic4.gif',
            text: 'children2',
            leaf: true},
        {
            icon: 'pic5.gif',
            text: 'children3',
            leaf: true}]}],

    },
{
    text: 'Parent2',
    icon: 'pic6.gif',
    children: [{
        icon: 'pic7.gif',
        text: 'children4',
        leaf: true},
    {
        icon: 'pic8.gif',
        text: 'children5',
        leaf: true},
    {
        icon: 'pic9.gif',
        text: "children6",
        leaf: true}]}];
Ext.onReady(function() {
    var tree = new Ext.tree.TreePanel({
        loader: new Ext.tree.TreeLoader(),
        width: 1000,
        height: 1000,
        renderTo: Ext.getBody(),
        root: new Ext.tree.AsyncTreeNode({
            expanded: false,
            leaf: false,
            icon: 'pic.gif'

            ,
            text: 'Head',
            children: children
        })
    });
});