ASP.net DropDownList 无刷新联动！
日期：2014-03-08 浏览次数：20542 次
<SCRIPT language='javascript'>
function load(){
var drp2 = document.getElementById("DropDownList2");
drp2.innerText="";
for(var i = 0;i<=drp2.options.length -1;i++){
drp2.remove(i);
}
var drp3 = document.getElementById("DropDownList3");
for(var i = 0;i<=drp3.options.length -1;i++){
drp3.remove(i);
}
var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");
var oDoc = new ActiveXObject("MSXML2.DOMDocument");
var state=document.getElementById("DropDownList1").value;
xmlhttp.open("POST", "webform1.aspx?id="+state,false);
xmlhttp.send("");
var res=oDoc.loadXML(xmlhttp.responseText);
var naItems = oDoc.selectNodes("//Market/Table/maName");
var idItems = oDoc.selectNodes("//Market/Table/maId");
var item;
var id;
for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){
var nastr = item.nodeTypedValue;
var idstr = id.nodeTypedValue;
var newOption = document.createElement("OPTION");
newOption.text =nastr;
newOption.value = idstr;
drp2.options.add(newOption);
}
load2();
}
function load2(){
var drp2 = document.getElementById("DropDownList3");
drp2.innerText="";
for(var i = 0;i<=drp2.options.length -1;i++){
drp2.remove(i);
}
var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");
var oDoc = new ActiveXObject("MSXML2.DOMDocument");
var state=document.getElementById("DropDownList2").value;
xmlhttp.open("POST", "webform3.aspx?id="+state,false);
xmlhttp.send("");
var res=oDoc.loadXML(xmlhttp.responseText);
var naItems = oDoc.selectNodes("//Market/Table/maName");
var idItems = oDoc.selectNodes("//Market/Table/maId");
var item;
var id;
for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){
var nastr = item.nodeTypedValue;
var idstr = id.nodeTypedValue;
var newOption = document.createElement("OPTION");
newOption.text =nastr;
newOption.value = idstr;
drp2.options.add(newOption);
}
}
</SCRIPT>
</HEAD>
<BODY ms_positioning="GridLayout" >
<FORM id="Form1" method="post" runat="server">
<ASP:DROPDOWNLIST
