function ToggleEditorDisplay( divClientID, imgClientUrl, expandImageUrl, minimizeImageUrl ) {

    var el = document.getElementById(divClientID) ;
    if( el.style.display=='none' ) {
        el.style.display='';
        document.images[imgClientUrl].src= minimizeImageUrl;
    } else {
        el.style.display='none';
        document.images[imgClientUrl].src= expandImageUrl;
    }
}