function navOn(value)
{
	document.getElementById('nav_0' + value).src = 'images/nav_0' + value + '-over.gif';
}

function navOff(value)
{
	document.getElementById('nav_0' + value).src = 'images/nav_0' + value + '.gif';
}

function contents(value){
	window.open('muqcontents.php?vol=' + value,'blank','menubar=no,scrollbars=yes,dependent=yes,width=600, height=600');
}