function show_menu(which) {
  
    if (check_browser() == 1)
      document.all.tags("div")[which].style.visibility="visible";
    else if (check_browser() == 2)
      document.layers[which].visibility = "show";
}

function hide_menu(which) {
  
    if (check_browser(which) == 1)
      document.all.tags("div")[which].style.visibility="hidden";
    else if (check_browser() == 2)
      document.layers[which].visibility = "hide";
}

function check_browser() {
  if (navigator.appName.indexOf("Microsoft Internet Explorer") == 0)
    return 1;
  else if (navigator.appName.indexOf("Netscape") == 0)
    return 2;
}

function watch_screen(x)
{
if(check_browser()==2)
	{
	b_width=window.outerWidth;
	}
else 
	{
	b_width=document.all.this_file.offsetWidth;
	};
if (b_width >= 800) 
	b_width=(b_width-800)/2;
else 
	b_width=0;
b_width=b_width + x;
return (b_width);
}

function resize_it()
{
	document.location.href.reload();
}