小妹写了个AJAX程序，jsp提交参数到java脚本后台，得到的查询结果返回给jsp，结果是有了，就是一闪而过。我把代码贴在下面，麻烦大虾们帮我看看~，多谢了！！
<!DOCTYPE html>
<html>
<head>
<title>search-Cp.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">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<script type="text/javascript">
var http_request = false;
function send_request(url) {//初始化、指定处理函数、发送请求的函数
http_request = false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest) { //Mozilla 浏览器
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {//设置MiME类别
http_request.overrideMimeType('text/xml');
}
}else if (window.ActiveXObject) { // IE浏览器
try{
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try{
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) { // 异常，创建对象实例失败
window.alert("不能创建XMLHttpRequest对象实例.");
return false;
}
http_request.onreadystatechange = processRequest;
// 确定发送请求的方式和URL以及是否同步执行下段代码
http_request.open("GET", url, true);
http_request.send(null);
}
// 处理返回信息的函数
function processRequest() {
if (http_request.readyState == 4) { // 判断对象状态
if (http_request.status == 200) { // 信息已经成功返回，开始处理信息
var kk=document.getElementById("txtHint");
kk.style.display="block";
document.getElementById("txtHint").innerHTML=http_request.responseText;
} else { //页面不正常
alert("您所请求的页面有异常。");
}
}
}
function search() {
var f=document.form2;
var element1 = f.element.value;
if(element1=="") {
window.alert("The user name can not be null!");
f.element.focus();
return false;
}else {
send_request('check.jsp?element='+element1);
}
}
</script>
<body><form name="form2" method="post" action="">
<table width="100%" border="1">
<tr>
<td width="200" height="25"><div align="right">请选择元素Element：</div></td>
<td><input type="text" name="element" id="element" /></td>
</tr>
<tr>
<td height="25"><div align="right">请选择相phase：</div></td>
<td> </td>
</tr>
<tr>
<td><div align="right">请输入温度：</div></td>