var version = parseInt(navigator.appVersion); 
n = (document.layers) ? 1 : 0;
m = (document.all) ? 1 : 0;
v = (n || m) ? 1 : 0;


function show(item){
  if (v) {
    if (item == "1"){
      if (n){
        turnoffall();
        document.layers['company'].visibility  = "show";}
      else {
        turnoffall();
        company.style.visibility = "visible";}
    }
    else if (item == "2"){
      if (n){
        turnoffall();
        document.layers['magazine'].visibility  = "show";}
      else {
        turnoffall();
        magazine.style.visibility = "visible";}
    }
    else if (item == "hider"){
      if (n){
        document.layers['hider'].visibility  = "show"; 
        document.layers['hiderup'].visibility  = "show"; 
           }
      else {
        hider.style.visibility = "visible";
        hiderup.style.visibility = "visible";}
      }
    }
   }
function turnoffall(){
  if (v) {
    if (n){
      document.layers['company'].visibility  = "hide";
      document.layers['magazine'].visibility  = "hide";
      document.layers['hiderup'].visibility  = "hide";
      document.layers['hider'].visibility  = "hide";
    }
    else {
      company.style.visibility = "hidden";
      magazine.style.visibility = "hidden";
      hiderup.style.visibility = "hidden";
      hider.style.visibility = "hidden";
    }
  }
}