function janelaCenter(url, nome, parms, width, height) {
 	var str = "height=" + height + ",innerHeight=" + height;
	str += ",width=" + width + ",innerWidth=" + width;
	if (parms != "") {
		str += ", " + parms;
	}
	if (window.screen) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;

		var xc = (aw - width) / 2;
		var yc = (ah - height) / 2;

	} else {
		var xc = 0, xy = 0;
	}
	str += ",left=" + xc + ",screenX=" + xc;
	str += ",top=" + yc + ",screenY=" + yc;
	return window.open(url, nome, str);
}

function janelaFull(url, nome, parms) {
	var str = "left=0,screenX=0,top=0,screenY=0";
	if (parms != "") {
		str += ", " + parms;
	}
	if (window.screen) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;
		str += ",height=" + ah;
		str += ",innerHeight=" + ah;
		str += ",width=" + aw;
		str += ",innerWidth=" + aw;
	} else {
		str += ",resizable"; // so the user can resize the window manually
	}
	return window.open(url, nome, str);
}