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<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<script>
function toDo(){
var url="op.jsp";
var xmlHttpRequest=new ActiveXObject("microsoft.xmlhttp");
xmlHttpRequest.open("post",url,true);
xmlHttpRequest.send(null);
xmlHttpRequest.onreadystatechange=function(){
if(xmlHttpRequest.readystate==4 && xmlHttpRequest.status==200){
ajax.innerHTML=xmlHttpRequest.responseText;
}
}
}
</script>
<body>
<input type="button" onclick="toDo()" value="查询"/><div id="ajax"></div>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
out.println("<select>");
out.println("<option>1</option>");
out.println("<option>2</option>");
out.println("</select>");
//也可从SERVLET里获取 1 2 的值 封装成 SELECT 标签的内容 OUT到页面。
%>