function collapse(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
}

function show(obj) {
	var el = document.getElementById(obj);

	if ( el.style.display == "none" ) {
		el.style.display = '';
	}

}

function hide(obj) {
	var el = document.getElementById(obj);

	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}

}