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"; } }