function divHidden(elem1) {
	elem = document.getElementById(elem1);
	if (elem.style.display=="" || elem.style.display=="block" ){
		elem.style.display="none";
	} 
}

function divVisible(elem1) {
	elem = document.getElementById(elem1);
	if (elem.style.display=="none" || elem.style.display==""){
		elem.style.display="block";
	} 
}

function classUpdateActive(id) {
	document.getElementById('page_'+id).style.fontWeight = 'bold';
}

function classUpdate(id) {
	document.getElementById('page_'+id).style.fontWeight = 'normal';
}