function toggle(id) {

	if (document.getElementById) {
		var el = document.getElementById(id);
	} else if (document.all) {
		var el = document.all(id);
	} else if (document.layers) {
		var el = document.layers[id];
	}

	if (el.style) {
		if (el.style.display == 'none'){
			el.style.display='';
		} else {
			el.style.display='none';
		}
	} else {
		// browser does not support style object,
		// hide some other way
	}
}