var bV=parseInt(navigator.appVersion);
IS_NS4=(document.layers) ? true : false;
IS_IE4=((document.all)&&(bV>=4))?true:false;
IS_VER4 = (IS_NS4 || IS_IE4) ? true : false;



function expandArea(el)
{ 
  if(!IS_VER4) retrun;
  whichEl = eval(el);
  if (whichEl.style.display == "none") { 
    whichEl.style.display = "block";
  }else{ 
    whichEl.style.display = "none";
  }
}