function toggle(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = 'block';
	}
}

function getStyle( layer ) {
	if( document.getElementById ) {
		return document.getElementById( layer ).style
	} else if( document.all ) {
		return document.all[layer].style
	} else {
		return document[layer]
	}
}