change default timediff

  function onRowClick() {

    var end = Date.now();

    var start = end - 300000;

    var start = end - 3600000;

    var raw_url = 

      "metric_list?metric="+ this.firstChild.id +

      "&view=value&start_time=" + start +

  var metric = query_params.innerViewValue;

  var table_container = document.createElement("div");

  var chart_container = document.createElement("div");

  var load_pane = document.createElement("div");

  var now = Date.now();

  var columns = [];

  var elems = {};

  var defaults = {

    view : "value",

    columns: "",

    end_time : now,

    /* 5 minutes  */

    time_to_end : 300000,

    time_to_end : 3600000,

    /* 1 second */

    t_step : 1000,

    t_window : 1000,

    t_step : 10000,

    t_window : 5000,

    by: ""

  }

  }

  function updateDateTimeElems(title, input, start_time, end_time) {

    console.log("update date time elems");

    var start_time = (start_time !== undefined) ? 

       start_time : getQueryParamOrDefaultValue("start_time");

    var start_str = 

      input.value = end_str;

      input.setAttribute("id", end_time);

    }

    console.log("start " + start_str);

    console.log("end " + end_str);

    title.innerHTML = 

      start_str + " — " + end_str;

  }

  function onDateSubmit(ts) {

    var start = 

      ts - getQueryParamOrDefault(time_to_end);

    updateURLParams("end_time", ts);

    updateURLParams("start_time", start);

  function onDateSubmit(timestamp) {

    var timestamp = parseInt(timestamp, 10);

    var start_time = 

      parseInt(getQueryParamOrDefaultValue("start_time"), 10);

    var end_time = 

      parseInt(getQueryParamOrDefaultValue("end_time"), 10);

    console.log("time diff " + (end_time - start_time));

    start_time = timestamp - (end_time - start_time);

    updateURLParams("end_time", timestamp);

    updateURLParams("start_time", start_time);

    runQuery();

    updateDateTimeElems(elems.timespan_title, null);

    //FIXME is it better to make the title elem accessible?

    var title = elem.querySelector(".current_date");

    updateDateTimeElems(title, null, start_time, end_time);

  }

  function initElems() {

    return (ts + (ts == 1? " minute" : " minutes"));

  }

  ts = ts / 360000;

  ts = ts / 3600000;

  return (ts + (ts == 1? " hour" : " hours"));

}