function AbreVentana(popup,w,h,s) {

  LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
  TopPosition = (screen.height) ? (screen.height-h)/2 : 0;

  WindowHandle=window.open(popup,"","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars="+s+",resizable=no,width="+w+",height="+h+",top="+TopPosition+",left="+LeftPosition);
}


function votar(f,u,c){  
  $.ajax({
    url:"votar.php",
    data:"f="+f+"&u="+u+"&c="+c,
    dataType:"json",
    success: function(datos){      
      if(datos[0]=="OK"){      
        document.getElementById("voto-"+f).innerHTML = datos[1];
        document.getElementById("boton-"+f).disabled=true;
        document.getElementById("boton-"+f).innerHTML="X";
             
      }else if(datos[0]=="ERROR"){
        window.alert(datos[1]);
      }
    }
  });
  
    
}