function hide()
{
	var showSubNav;
	
	showSubNav = document.getElementById('idSubNav').style.display;

	if (showSubNav == 'none')
	
	{
		document.getElementById('idSubNav').style.display = 'block';
	}
	else
	{
		document.getElementById('idSubNav').style.display = 'none';
	}
	
	
}