$(document).ready(function(){
        //获取项目下拉框的值（项目编号）
        var ddlxm=$("#<%=drpXMName.ClientID %>");
        ddlxm.change(function(){
             $.post(
               "../ajax/GetHTByObjHandler.ashx",
               {xmNumber:$('#<%=drpXMName.ClientID %> option:selected').val()},
               function(results){
                    $("#divht").val(results);                          
               }),"html";
        })
    })

 context.Response.ContentType = "text/html";

        //读取传过来的项目
        string xmNumber = context.Request.QueryString["xmNumber"];
        HTBLL bll = new HTBLL();

        IList<Tb_HTInfo> list = bll.GetHTMessageByObjNumber(xmNumber);
        StringBuilder sd = new StringBuilder();
        sd.Append("<select id=\"ddlHT\"> runat=\"server\"");
        sd.Append("<option value=\"--请选择--\"  selected=\"selected\">--请选择--</option>");
        if (list.Count > 0)
        {
            for (int i = 0; i < list.Count; i++)
            {
                sd.Append("<option value=\""+list[i].Ht_HTnumber+"\"  selected=\"selected\">"+list[i].Ht_HTName+"</option>");
            }
        }
        sd.Append("</select>");
        context.Response.Write(sd);