function abreUrl(url, width, height){
	
	var widthVisit = screen.width;
	var heightVisit = screen.height;
	
	var meio_w = widthVisit/2;
	var meio_h = heightVisit/2;

	
	var altura = height/2;
	var largura = width/2;

  	var left = (meio_w - largura);
  	var top = (meio_h - altura);	
	
	window.open(url,'Pagina', 'width='+width+', height='+height+', top='+top+', left='+left+', SCROLLBARS=NO, STATUS=NO, TOOLBAR=NO, LOCATION=NO, DIRECTORIES=NO, MENUBAR=NO, RESIZABLE=NO, FULLSCREEN=NO');
}