function navigationtype_change()
{
	navtype = document.getElementById('navigationtype');

	switch (navtype.options[navtype.selectedIndex].value) {
		case 'date':
			document.getElementById('dateyear').style.display = 'block';
			document.getElementById('department').style.display = 'none';
			document.getElementById('datemonth').style.display = 'block';
			dateyear_change();
			break;
		case 'department':
			document.getElementById('dateyear').style.display = 'none';
			document.getElementById('department').style.display = 'block';
			document.getElementById('datemonth').style.display = 'none';
			department_change();
			break;
	}
}


function dateyear_change()
{
	theform = document.getElementById('listmediareleases');
	thedateyear = document.getElementById('dateyear');

	theform.action = 'index.php?module=pagesetter&tid=13&filter=date^like^' + thedateyear.options[thedateyear.selectedIndex].value;
	theform.submit();
}


function department_change()
{
	theform = document.getElementById('listmediareleases');
	thedepartment = document.getElementById('department');
	
	theform.action = 'index.php?module=pagesetter&tid=13&filter=department^sub^' + thedepartment.options[thedepartment.selectedIndex].value;
	theform.submit();
}