Setp 1: Placing master and detail comboes in page , master combo should be filled in server so we use DropDownList extension method.
<%= Html.DropDownList("master", Model.MasterItems, "Please select
master first.")%>
<select id="detail" name="detail"></select>
Setp2: Referencing js file.
type="text/javascript" src="/Scripts/Mehr.js"></script>
pmd1 = new MasterDetail("master", "detail", "/detail/GetList/", "Please select master first.");
Parameter include