📄 listajax.html
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<html>
<head>
<title>MyHtml.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<script type="text/javascript">
function getResult(stateVal) {
var url = "postajax.jsp?state="+stateVal;
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
req = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req){
req.open("GET",url, true);
req.onreadystatechange = complete;
req.send(null);
}
}
function complete(){
if (req.readyState == 4) {
if (req.status == 200) {
var city = req.responseXML.getElementsByTagName("city");
//file:alert(city.length);
var str=new Array();
for(var i=0;i<city.length;i++){
str[i]=city[i].firstChild.data;
}
//file:alert(document.getElementById("city"));
buildSelect(str,document.getElementById("city"));
}
}
}
function buildSelect(str,sel) {
sel.options.length=0;
for(var i=0;i<str.length;i++) {
sel.options[sel.options.length]=new Option(str[i],str[i])
}
}
</script>
<body>
<select name="state" onChange="getResult(this.value)">
<option value="">Select</option>
<option value="zj">ZEHJIANG</option>
<option value="zs">JIANGSU</option></select>
<select id="city">
<option value="">CITY</option>
</select>
</body>
</html>
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