function toggle_menu(subMenu)
{
	if(document.getElementById)
	{
		if(subMenu == 'off')
			var objmenu="off";
		else
		{
			var objmenu = eval("document.getElementById('"+subMenu+"')");
			switch_on(objmenu);
		}
		var catmenu = eval("document.getElementById('libcat_sub')");
		var bedsmenu = eval("document.getElementById('about_sub')");
		var booksmenu = eval("document.getElementById('bmf_sub')");
		var infomenu = eval("document.getElementById('info_sub')");
		var locstdmenu = eval("document.getElementById('locstd_sub')");
		var locinfmenu = eval("document.getElementById('locinf_sub')");
		var kidsmenu = eval("document.getElementById('child_teen_sub')");
		var lrnmenu = eval("document.getElementById('lrn_sub')");
		if(catmenu != objmenu)
			switch_off(catmenu);
		if(bedsmenu != objmenu)
			switch_off(bedsmenu);
		if(booksmenu != objmenu)
			switch_off(booksmenu);
		if(infomenu != objmenu)
			switch_off(infomenu);
		if(locstdmenu != objmenu)
			switch_off(locstdmenu);
		if(locinfmenu != objmenu)
			switch_off(locinfmenu);
		if(kidsmenu != objmenu)
			switch_off(kidsmenu);
		if(lrnmenu != objmenu)
			switch_off(lrnmenu);
	}
	return(true);
}

function switch_on(objMenu)
{
		objMenu.className='on';
		objMenu.style.display='block';
}

function switch_off(objMenu)
{
	if(objMenu)
	{
		objMenu.className='off';
		objMenu.style.display='none';
	}
}