ajax|请求|异步
<script>
//设一个变量
var XMLHttpReq=false;
//创建一个XMLHttpRequest对象
function createXMLHttpRequest(){
if(window.XMLHttpRequest){ //Mozilla
XMLHttpReq=new XMLHttpRequest();
}
else if(window.ActiveXObject){
try{
XMLHttpReq=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
XMLHttpReq=new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){}
}
}
}
//发送请求函数
function send(url){
createXMLHttpRequest();
XMLHttpReq.open("GET",url,true);
XMLHttpReq.onreadystatechange=proce; //指定响应的函数
XMLHttpReq.send(null); //发送请求
}
function proce(){
if(XMLHttpReq.readyState==4){ //对象状态
if(XMLHttpReq.status==200){//信息已成功返回，开始处理信息
var res=XMLHttpReq.responseText;
document.getElementById("info").innerHTML = res;
//window.alert(res);
}else{
window.alert("所请求的页面有异常");
}
}
}
//身份验证
function check(){
//var name=document.getElementById("name").value;
var province=document.getElementById("state");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
//var pText = province.options[pindex].text;
if(pValue==""){
alert("请输入姓名");
return false;
}
else{
send('model.cfm?event='+pValue);
}
}
</script>
</head>
<body>
<table>
<form action="login" method="post">
<tr><td>姓名: <input id="name" type="text" name="name1"/><p>
<input type="button" value="检测!" />
</td>
<td align="left">
<select id="state" name="state" >
<option value="866">Virginia</option>
<option value="867">Georgia</option>
<option value="865">California</option>
</select>
</td>
</tr>
</form>
</table>
<DIV><span name="info" id="info" style="background:#eeffdd; padding-left:4px; padding-right:4px;"></span></DIV>
</body>