function $(id)
{
	return document.getElementById(id);
}

function toggleMenu(id)
{
	$('m_' + id).style.display = ($('m_' + id).style.display == 'block' ? 'none' : 'block');
}

function openWindow(url, w, h)
{
	open(url, "", 'menubar=no,directories=no,location=no,resizable=no, target=viv, scrollbars=no, width='+(w+20) +',height='+(h+20));
}