function my$(id){
	return document.getElementById(id);
}

function IE(version){
	if(!version) version = 'all';
	var msieIndex = navigator.appVersion.indexOf("MSIE");
	if(msieIndex == -1) return false;
	var ieversion = parseFloat(navigator.appVersion.substr(msieIndex + 5,3));
	if(version == 'all' || ieversion <= version) return true;
return false;
}
function nav_menu_on(el){
 	if(IE(6))
		my$(el).style.display = 'block';
}
function nav_menu_off(el){
 	if(IE(6))
		my$(el).style.display = 'none';
}