d3.select("select#sentry").on("change",function(){
  var msg_id=d3.select("select#sentry").node().value;
  d3.json("/admin/json/mensajes/"+msg_id ,function(d){  
     if(d[0] !=undefined) {if(d[0] != 0){ 
      d3.select("p#fecha").text(d[0].imdate);
      d3.select("p#correo").text(d[0].imail);
      d3.select("p#nombre").text(d[0].imname);
      d3.select("p#mensaje").text(d[0].immsg);
     }}});
});