function popVoucher(rg)
{
	if(rg == '')
	{
		alert("Por favor, digite o RG.");
		document.getElementById('vc_rg').focus();
	}
	else
	{
		var W 	= 620; 	
		var H 	= 500;
		var X 	= Math.ceil( (window.screen.height - H) / 2 );
		var Y 	= Math.ceil( (window.screen.width - W) / 2 );
		window.open('voucher.asp?vc_rg='+rg,'ft_voucher','width='+W+',height='+H+',top='+X+',left='+Y+',location=no,status=yes,menubar=yes,scrollbars=yes,resizable=no,directories=no,toolbar=no');
	}
}