// Changes visiblity of specified block
function switchVisible(chid) {
    var chl = document.getElementById(chid);
    /*if( chl.style.visibility == "hidden" )
          chl.style.visibility = "visible";
      else
          chl.style.visibility = "hidden";
     */
    if( chl.style.display == "block" )
        chl.style.display = "none";
    else
        chl.style.display = "block";
}

// vim: sw=4 et fdm=marker