function openWindow( windowURL, windowName, windowFeatures )
{ 
	window.open( windowURL, windowName, windowFeatures ) ; 
}
function valButton(btn)
{
	var cnt = -1;
	for (var i=0; i < btn.length; i++)
	{
		if (btn[i].checked)
		{
			cnt = i;
			i = btn.length;
		}
	}
	if (cnt > -1)
		return btn[cnt].value;
	else
		return null;
}