function CollapseItem(obj, args)  
        {  
            if (args.Item.Expanded == true)  
            {  
                args.Item.Collapse();  
                return false;  
            }  
        }  

function OnLoad(sender, args)     
{     
    var panelbar = sender;     
    
    for (var i = 0; i < panelbar.AllItems.length; i++)     
    {     
        var panelItem = panelbar.AllItems[i];     
             
        if (panelItem.ImageElement)     
        {     
            panelItem.ImageElement.AssociatedItem = panelItem;     
            panelItem.ImageElement.onclick = function (e)     
            {     
                if (!e) e = window.event;     
                     
                if (this.AssociatedItem.Expanded)     
                {     
                    this.AssociatedItem.Collapse();     
                }     
                else    
                {     
                    this.AssociatedItem.Expand();     
                }     
                     
                e.cancelBubble = true;     
                if (e.stopPropagation)     
                {     
                    e.stopPropagation();     
                }     
                return false;     
            }     
        }     
    }     
}