function expandcollapse (idnum, menuitem) { 

   whichnum  = document.getElementById(idnum);
   whichitem = document.getElementById(menuitem);

   // workaround for IE: change paragraph className to
   // show a border for 'p' iff clicked on

   if (whichnum.className=="block idshown") {
      whichnum.className="block_nodisplay idhidden";
   }
   else {
      whichnum.className="block idshown";
   }
   
   if (whichitem.className=="menu submenu menu_off") {
      whichitem.className="menu submenu menu_on";
    }
    else {
      whichitem.className="menu submenu menu_off";
    }

}

function imgHover (imgId) {

	whichImg     = document.getElementById(imgId);
	whichImg.src = 'files/' + imgId  + '_h.gif';

}

function imgOff (imgId) {

	whichImg     = document.getElementById(imgId);
	whichImg.src = 'files/' + imgId + '.gif';
}