基本信息
源码名称:jsp JSON入门示例代码
源码大小:1.16M
文件格式:.zip
开发语言:C#
更新时间:2016-05-23
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   源码介绍

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>city.html</title>

		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="this is my page">
		<meta http-equiv="content-type" content="text/html; charset=UTF-8">

		<script type="text/javascript" src="js/json2.js"></script>
		<script type="text/javascript">
        function getXmlHttpRequest(){
            var xhr = null;
               if((typeof XMLHttpRequest)!='undefined'){
                  xhr = new XMLHttpRequest();
               }else {
                  xhr = new ActiveXObject('Microsoft.XMLHttp');
               }
               return xhr;
        }
        function change(v1){
            var xhr = getXmlHttpRequest();
            xhr.open('post','city.do',true);
            xhr.setRequestHeader("Content-Type",
                "application/x-www-form-urlencoded");
            xhr.onreadystatechange=function(){
                if(xhr.readyState == 4){
                    var txt = xhr.responseText;
                    var citys = txt.parseJSON();
                    document.getElementById('s2').innerHTML = '';
                    for(i=0;i<citys.length;i  ){
                        var op = 
                        new Option(citys[i].cityName,
                        citys[i].cityValue);
                        document.getElementById('s2').options[i] = op;
                    }
                }
            };
            xhr.send('name='   v1);
        }
    </script>
	</head>

	<body>
		<select id="s1" style="width: 120px;" onchange="change(this.value);">
			<option value="sh">
				上海
			</option>
			<option value="bj">
				北京
			</option>
		</select>
		<select id="s2" style="width: 120px;">
		</select>
	</body>
</html>