function loadOrg_Fld()
     {
         var cn=document.getElementById("org_fld");
         if(cn.options.length==1)
         {
               request.open("Post","GetServerData.aspx",true);
               request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
               request.onreadystatechange=renderOrg_Fld;
               request.send("action=gf");
         }
     }
     
    function renderOrg_Fld()
    {
        if(request.readyState==4)
        {
           if(request.status==200)
           {
               var xdoc=request.responseXML.documentElement;
               var con=document.getElementById("org_fld");
               for(var i=0;i<xdoc.getElementsByTagName("field").length;i++)
               {
                    var a = document.createElement('option');  
                    a.value = xdoc.getElementsByTagName("fdId")[i].childNodes[0].nodeValue;  
                    //a.setAttribute("value",xdoc.getElementsByTagName("fdId")[i].childNodes[0].nodeValue);
                    a.innerHTML = xdoc.getElementsByTagName("fdName")[i].childNodes[0].nodeValue;  
                    //a.setAttribute("text",xdoc.getElementsByTagName("fdName")[i].childNodes[0].nodeValue);  
                    con.appendChild(a); 
               }
           }
           else
           {
               alert("错误:"+request.statusText+",请刷新,若还不行,请联系网站负责人!");
           }
        }
    }
    
    function loadOrg_Dtr()
    {
       var cn=document.getElementById("org_dtr");
       if(cn.options.length==1)
       {
         request.open("Post","GetServerData.aspx",true);
         request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
         request.onreadystatechange=renderOrg_Dtr;
         request.send("action=gd");
       }
    }
    
    function renderOrg_Dtr()
    {
       if(request.readyState==4)
       {
           if(request.status==200)
           {
               var xdoc=request.responseXML.documentElement;
               var con=document.getElementById("org_dtr");
               for(var i=0;i<xdoc.getElementsByTagName("district").length;i++)
               {
                   var a = document.createElement('option');  
                   a.value = xdoc.getElementsByTagName("dtrId")[i].childNodes[0].nodeValue;  
                  //a.setAttribute("value",xdoc.getElementsByTagName("dtrId")[i].childNodes[0].nodeValue);
                   a.innerHTML = xdoc.getElementsByTagName("dtrName")[i].childNodes[0].nodeValue;  
                   //a.setAttribute("text",xdoc.getElementsByTagName("dtrName")[i].childNodes[0].nodeValue);  
                   con.appendChild(a); 
               }
           }
           else
           {
               alert("错误:"+request.statusText+",请刷新,若还不行,请联系网站负责人!");
           }
       }
    }
     
    function search()
    {
      var frm=document.forms[0];
      var fid=frm.org_fld.value;
      var did=frm.org_dtr.value;
      var kw=frm.org_kw.value;
      var url="Providers.aspx?fld="+fid+"&dtr="+did+"&kw="+ encodeURIComponent(kw);
      location.href=url;
    }