var xmlhttp
function loadAjax() {
    if (window.XMLHttpRequest) {
        xmlhttp = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    
     }

 }

 function CITY() {
     var str = document.getElementById('Promary').value;
     var url = "Ajaxcity.aspx?id=" + str + "&cid=" + Math.random();
     loadAjax();
     xmlhttp.open("GET", url, true);
     xmlhttp.onreadystatechange = function() {
         if (xmlhttp.readyState == 4) {
             if (xmlhttp.status == 200) {

                var root = xmlhttp.responseXML.documentElement;
                var x = root.getElementsByTagName("bcname");
                document.getElementById('city').options.length = 0;
                document.getElementById('city').options[0] = new Option("==请选择==");
			       for(i=0;i<x.length;i++){
			      	var id=x[i].getAttribute("id");
				var txt=x[i].childNodes[0].nodeValue;
				document.getElementById('city').options[i + 1] = new Option(txt, id);
                            
                             }
             }
         }
     };
     xmlhttp.send(null);

 }

 function dd() {
     var str = document.getElementById('county').value;
     document.getElementById("h1").value = str;
  }

  function bb() {
      var str = document.getElementById('stype').value;
      document.getElementById("h2").value = str;
  }

  function cc() {
      var str = document.getElementById('city').value;
      document.getElementById("h1").value = str;
  }

  function TYPE() {
      var str = document.getElementById('btype').value;
      var url = "Ajaxtype.aspx?id=" + str + "&cid=" + Math.random();
      loadAjax();
      xmlhttp.open("GET", url, true);
      xmlhttp.onreadystatechange = function() {
          if (xmlhttp.readyState == 4) {
              if (xmlhttp.status == 200) {

                  var root = xmlhttp.responseXML.documentElement;
                  var x = root.getElementsByTagName("bcname");
                  document.getElementById('stype').options.length = 0;
                  document.getElementById('stype').options[0] = new Option("==请选择==");
                  for (i = 0; i < x.length; i++) {
                      var id = x[i].getAttribute("id");
                      var txt = x[i].childNodes[0].nodeValue;
                      document.getElementById('stype').options[i + 1] = new Option(txt, id);

                  }
              }
          }
      };
      xmlhttp.send(null);

  }


  function COUNTY() {

      if (document.getElementById('county')) {
          document.getElementById('county').options[0].selected = true;
          
      }
     var str = document.getElementById('city').value;
     var url = "AjaxCounty.aspx?cityid=" + str + "&bid=" + Math.random();
     loadAjax();
     xmlhttp.open("GET", url, true);
     xmlhttp.onreadystatechange = function() {
         if (xmlhttp.readyState == 4) {
             if (xmlhttp.status == 200) {

                 var root = xmlhttp.responseXML.documentElement;
                 var x = root.getElementsByTagName("bcname");
                 document.getElementById('county').options.length = 0;
                 document.getElementById('county').options[0] = new Option("==请选择==", 0);
                 for (i = 0; i < x.length; i++) {
                     var id = x[i].getAttribute("id");
                     var txt = x[i].childNodes[0].nodeValue;
                     document.getElementById('county').options[i + 1] = new Option(txt, id);

                 }
             }
         }
     };
     xmlhttp.send(null);
 }