version=0
if (navigator.appName=="Netscape")
  version=parseFloat(navigator.appVersion);
if (navigator.appVersion.indexOf("MSIE")!=-1){
  temp=navigator.appVersion.split("MSIE")
  version=parseFloat(temp[1])
}
//version is now set correctly
if (version >= 5) { //begin if level 1
  // NN5+ or IE5+

} //end if level 1
else // begin else level 1
{
	if (document.all.sidebar1) 
		{
		document.all.sidebar1.style = "hidden";
		} 
	else
	{
		if (document.all.sidebar2)
		{
		document.all.sidebar2.style = "shown";
		}
		else{}
	}
} //end else level 1