function openPopup(url, nome, Wwidth, Wheight)
{
	Swidth	= screen.width;
	Sheight = screen.height;

	Wleft	= (Swidth / 2) - (Wwidth / 2) - 8;
	Wtop	= (Sheight / 2) - (Wheight / 2) - 20;
	
	params	= "toolbar=no, resizable=no, scrollbars=yes, status=no, left=" + Wleft + ", top=" + Wtop + ", width=" + Wwidth + ", height=" + Wheight;
	
	
	
	window.open(url, 'janela', params);

}