function hidesubs()
{
	document.getElementById("librarynav").style.visibility='hidden';
	document.getElementById("aboutusnav").style.visibility='hidden';
	document.getElementById("radionav").style.visibility='hidden';
	document.getElementById("contactnav").style.visibility='hidden';
}



function showabout()
{
	document.getElementById("librarynav").style.visibility='hidden';
	document.getElementById("aboutusnav").style.visibility='visible';
	document.getElementById("radionav").style.visibility='hidden';
	document.getElementById("contactnav").style.visibility='hidden';
}

function showlib()
{
	document.getElementById("librarynav").style.visibility='visible';
	document.getElementById("aboutusnav").style.visibility='hidden';
	document.getElementById("radionav").style.visibility='hidden';
	document.getElementById("contactnav").style.visibility='hidden';
}

function showradio()
{
	document.getElementById("librarynav").style.visibility='hidden';
	document.getElementById("aboutusnav").style.visibility='hidden';
	document.getElementById("radionav").style.visibility='visible';
	document.getElementById("contactnav").style.visibility='hidden';
}

function showcontact()
{
	document.getElementById("librarynav").style.visibility='hidden';
	document.getElementById("aboutusnav").style.visibility='hidden';
	document.getElementById("radionav").style.visibility='hidden';
	document.getElementById("contactnav").style.visibility='visible';
}