function CloseCollapsibles(sender) {
    
    for (var i = 0; i < collapsibleBehaviorIds.length; i++) {
        var behavior = $find(collapsibleBehaviorIds[i]);
        if (!behavior) continue;

        var SenderID = behavior._collapseControlID
        var strCpePanelStateID = SenderID.replace("HeaderPanel", 'cpe_PanelState');
        var CpePanelState = document.getElementById(strCpePanelStateID);

        if ((sender.id == behavior._collapseControlID) && (CpePanelState.value == "Collapsed")) {
            CpePanelState.value = "Opened"
        }
        else {
            CpePanelState.value = "Collapsed";
        }
                
        if ((sender.id != behavior._collapseControlID) && (!behavior._collapsed)) {

            behavior._doClose();
        }
            
    }
}