function openWinCenter(URL, N, W, H, S)
{
  L = (screen.width - W) / 2;
  T = (screen.height - H) / 2;
  newWin = window.open(URL, N,"scrollbars="+S+",width=" + W + ",height=" + H +",top=" + T+ ",left=" + L);
  newWin.focus();
}

function imprimir()
{
	if(confirm('Clique em OK para imprimir.'))
	{
	window.print();
	}
}