Load PartialView with using jquery Ajax?

PartialView

@model OsosYeni23072012.Models.TblMeters
<h3>
    Model.customer_name
</h3>
<h3>
    Model.meter_name
</h3>

Controller

[HttpGet]
public ActionResult MeterInfoPartial(string meter_id)
{
    int _meter_id = Int32.Parse(meter_id);
    var _meter = entity.TblMeters.Where(x => x.sno == _meter_id).FirstOrDefault();

    return PartialView("MeterInfoPartial", _meter);
}

Razor

@Html.DropDownList("sno", new SelectList(Model, "sno", "meter_name"), "-- Select Meter --", new { id = "meters"})

@Html.Partial("MeterInfoPartial")

I want to load partial view, if dropdownlist change. But I dont know How can I do this. I cant find any example about this. I do this with actionlink. But I did not with dropdown before.

controller parameter meter_id equals dropdownlist selectedvalue.

Thanks.