function navOpen(x){
	if(document.all)document.all('subnav'+x).style.visibility="visible";
	if(!document.all && document.getElementById)document.getElementById('subnav'+x).style.visibility="visible";
}

function navClose(x){
	if(document.all)document.all('subnav'+x).style.visibility="hidden";
	if(!document.all && document.getElementById)document.getElementById('subnav'+x).style.visibility="hidden";
}