function showHideNav( divname )
{
	if( getObj(divname).style.display == "" ) getObj(divname).style.display = 'none';
		else getObj(divname).style.display = '';
}


function getObj(item) {
	if (document.all) return(document.all[item]);
	if (document.getElementById) return(document.getElementById(item));
	return(false);
}