function showhide(fld){
	if(fld.checked == true){
		document.getElementById('options').style.display = 'inline';
	}else if(fld.checked == false){
		document.getElementById('options').style.display = 'none';
	}
}

function allclass(fld){
	if(fld.checked == true){
		document.getElementById('classes:1').checked = true;
		document.getElementById('classes:29').checked = true;
		document.getElementById('classes:2').checked = true;
		document.getElementById('classes:3').checked = true;
		document.getElementById('classes:4').checked = true;
		document.getElementById('classes:5').checked = true;
		document.getElementById('classes:56').checked = true;
		document.getElementById('classes:6').checked = true;
		document.getElementById('classes:28').checked = true;
		document.getElementById('classes:7').checked = true;
		document.getElementById('classes:8').checked = true;
		document.getElementById('classes:9').checked = true;
		document.getElementById('classes:10').checked = true;
		document.getElementById('classes:34').checked = true;
		document.getElementById('classes:45').checked = true;
		document.getElementById('classes:12').checked = true;
		document.getElementById('classes:27').checked = true;
		document.getElementById('classes:59').checked = true;
	}else if(fld.checked == false){
		document.getElementById('classes:1').checked = false;
		document.getElementById('classes:29').checked = false;
		document.getElementById('classes:2').checked = false;
		document.getElementById('classes:3').checked = false;
		document.getElementById('classes:4').checked = false;
		document.getElementById('classes:5').checked = false;
		document.getElementById('classes:56').checked = false;
		document.getElementById('classes:6').checked = false;
		document.getElementById('classes:28').checked = false;
		document.getElementById('classes:7').checked = false;
		document.getElementById('classes:8').checked = false;
		document.getElementById('classes:9').checked = false;
		document.getElementById('classes:10').checked = false;
		document.getElementById('classes:34').checked = false;
		document.getElementById('classes:45').checked = false;
		document.getElementById('classes:12').checked = false;
		document.getElementById('classes:27').checked = false;
		document.getElementById('classes:59').checked = false;
	}
}