javascript写ajax代码
<%@pagelanguage="java"contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<title>Ajax一</title>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8">
<scripttype="text/javascript">
functionsub(){
varxmlhttp;
if(window.XMLHttpRequest)
{//codeforIE7+,Firefox,Chrome,Opera,Safari
alert("1111");
xmlhttp=newXMLHttpRequest();
}
else
{//codeforIE6,IE5
xmlhttp=newActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if(xmlhttp.readyState==4&&xmlhttp.status==200)
{
alert("222");
document.getElementById("result").innerHTML=xmlhttp.responseText;
}
}
varurl="HelloServlet?user="+document.getElementById("user").value+"&date="+newDate();
xmlhttp.open("GET",url,true);
xmlhttp.send();
}
</script>
</head>
<bodystyle="text-align:center;">
<form>
<inputid="user"type="text"name="user"/>
<buttononclick="sub()">提交</button>
</form>
<divid="result"></div>
</body>
</html>