var obj_showing;
function hide() {
	if (obj_showing) {
		obj_showing.style.display = 'none';
		document.myform.id.value = '';
	}
	return
}
function show(id) {
	var d = document.getElementById(id);
	if (d) {
		d.style.display='block';
		obj_showing = d;
		document.myform.id.value = obj_showing.id;
	}
	return
}