var ln=7,tm=null;

function m(n)
{
  if(tm!=null) clearTimeout(tm);
  tm=setTimeout('mr('+n+')',500);
  return(true);
}
function mr(n) {
  if(document.layers) {
    l=document.layers['l'+n];
    if(l) z=l.zIndex; else z=0;
    for(i=1;i<=ln;i++) {
      l=document.layers['l'+i];
      if(i==n)
        l.visibility='show';
      else if(l.zIndex>=z)
        l.visibility='hide';
    }
  } else if(document.all) {
    l=eval('document.all.l'+n);
    if(l) z=l.style.zIndex; else z=0;
    for(i=1;i<=ln;i++) {
      l=eval('document.all.l'+i);
      if(i==n)
        l.style.visibility='visible';
      else if(l.style.zIndex>=z)
        l.style.visibility='hidden';
    }
  }
}