function activate( object ) {

	clearCurrentActive();

	object.className = 'active';
	document.getElementById('currentitem').src = object.href;
	return false;

} // activate

function clearCurrentActive() {
	
	var object = document.getElementById( 'portfolioonderblok' ) || document.getElementById( 'fotonummers' );
	var children = object.getElementsByTagName( 'a' );
	for( var i = 0 ; i < children.length ; i++ ) {
		children[i].className = '';
	} // for

} // clearCurrentActive()


function activate2( object ) {
	clearCurrentActive2();

	object.className = 'active';
	document.getElementById('portfolio' + object.id).style.display = "block";
	return false;

} // activate

function clearCurrentActive2() {
	var object = document.getElementById( 'portfolioonderblok' ) || document.getElementById( 'fotonummers' );
	var children = object.getElementsByTagName( 'a' );
	for( var i = 0 ; i < children.length ; i++ ) {
		document.getElementById('portfolio' + children[i].id).style.display = "none";
		children[i].className = '';
	} // for
} // clearCurrentActive()