var bV=parseInt(navigator.appVersion);
     NS4=(document.layers) ? true : false;
     IE4=((document.all)&&(bV>=4))?true:false;
     ver4 = (NS4 || IE4) ? true : false;

     if (ver4) {
         with (document) {
             write("<STYLE TYPE='text/css'>");
             if (NS4) {
                 write(".parent {position:absolute; visibility:visible}");
                 write(".child {position:absolute; visibility:visible}");
                 write(".regular {position:absolute; visibility:visible}")
             }
             else {
                 write(".child {display:none}")
             }
             write("</STYLE>");
         }
     }