function display_kendoui_grid_error(n) {
  if(n.errors)
    if(typeof n.errors=="string")
      alert(n.errors);
    else {
      var t="The following errors have occurred:";
      $.each(n.errors, function(n,i) {
        i.errors && (t+="n", t+=i.errors.join("n"))
      });
      alert(t)
    }
  else
    alert("Error happened")
}

alert("Error happened: " + JSON.stringify(n));