function hideBox(id,action) {
	var box = document.getElementById(id);
	var hideClass = 'hide_box';
	var showClass = 'show_box';
	var useClass;
	if(action=='show')
		useClass = showClass;
	else 
		useClass = hideClass;
	if(typeof box != undefined)
		box.className = useClass;
}

function showBox(id) {
	hideBox(id,'show');
}