function popups(URL,width,height,barra) {

	// Definindo meio da tela
	var left= (screen.width - width)/2;
	var top = (screen.height - height)/2;


window.open(URL,'janela', 'width='+width+', height='+height+', top='+top+', left='+left+', scrollbars='+barra+', status=no, toolbar=no, location=no, directories=no, menubar=no, resizable=no, fullscreen=no');

}

function close_window() {
   window.close();
}