function switch_element(id)
{
 if(document.getElementById(id).style.display == 'none') {
		document.getElementById(id).style.display = 'block';
 } else {
		document.getElementById(id).style.display = 'none';
 }
}


var var_switch_all = false;
function switch_all() { 
	if (var_switch_all)	{
		document.getElementById('section_ub').innerHTML = "(expand all)"; 
		document.getElementById('section01').style.display = 'none';
		document.getElementById('section02').style.display = 'none';
		document.getElementById('section03').style.display = 'none';
		document.getElementById('section04').style.display = 'none';
		document.getElementById('section05').style.display = 'none';
		document.getElementById('section06').style.display = 'none';
		document.getElementById('section07').style.display = 'none';
		document.getElementById('section08').style.display = 'none';
		document.getElementById('section09').style.display = 'none';
		document.getElementById('section10').style.display = 'none';		
	
		var_switch_all = false;
	} else	{
		document.getElementById('section_ub').innerHTML = "(collapse all)"; 	
		document.getElementById('section01').style.display = 'block';
		document.getElementById('section02').style.display = 'block';
		document.getElementById('section03').style.display = 'block';
		document.getElementById('section04').style.display = 'block';
		document.getElementById('section05').style.display = 'block';
		document.getElementById('section06').style.display = 'block';
		document.getElementById('section07').style.display = 'block';
		document.getElementById('section08').style.display = 'block';
		document.getElementById('section09').style.display = 'block';
		document.getElementById('section10').style.display = 'block';		
		var_switch_all = true;
	} }