- by Mo
            
            
            Hi
i have this method:
set_period_help_text: function(periodInput){
        var metric = MonitorMetric.getSelectedMetric();
        var periodStr = $('select[name=metric_period]').val();
        var datapoints = Number(periodInput.attr("value"));
        var period = datapoints * periodLookup[periodStr][0];
}
var periodLookup = {
    "OneMinute": [1, "minute"],
    "FiveMinute": [5, "minute"],
    "OneHour": [1, "hour"],
    "OneDay": [1, "day"],
    "OneWeek": [1, "week"]
};
where var periodStr is being retrived from a dropdown menue that only has the values: 
    "OneMinute"
    "FiveMinute" 
    "OneHour"
    "OneDay"
    "OneWeek"
i get a java script error when the page loads: 
  periodLookup[periodStr] is undefined
  [Break on this error] var period =
  datapoints *
  periodLookup[periodStr][0];