var popup=0; 
function newWindow(newURL,left,top,width,height) {
  popup = window.open(newURL,'popup','toolbar=no,location=no,scrollbars=yes,directories=no,status=no,menubar=no,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}


var menu01 = "menu01";
var menu02 = "menu02";
var menu03 = "menu03";

function show (elementvariable) {
  if (document.getElementById)
    document.getElementById(elementvariable).style.visibility = "visible";
    document.getElementById(elementvariable).style.display = "block";
}
function hide (elementvariable) {
  if (document.getElementById)
    document.getElementById(elementvariable).style.visibility = "hidden";
    document.getElementById(elementvariable).style.display = "none";
}