Question

大家早上好。我尝试创建一个可以从另一个页面获取信息并将响应提供给div标签的网站，但它没有用。我查了一下我从中学到的非常相似的东西。这是HTML代码。

<html>
<head>

<script>
function checkit(){
var samxml; var username;
if (window.XMLHttpRequest){
samxml = new XMLHttpRequest();}
else  {
samxml = new ActiveXObject("Microsoft.XMLHTTP");
}

samxml.onreadystatechange = function() {

if (samxml.readyState == 4 && samxml.status == 200){
document.getElementById("check").innerHTML = samxml.responseText;}
}
username = document.getElementById("username").value;
samxml.open("POST", "check.php",true);

samxml.send( "username" );



}
}

</script>
</head>
<body>
<form>
<label for ="username">User ID:</label>
<input type = "text" name = "username" id = "username"/>


<div id = "check"></div>
<button type = "button" onclick = "checkit()">Check</button>
</form>




</body>
</html>

这是PHP页面：

//php file
<?php
$user = $_POST["username"];
if ($user == "samuel") {
echo "Hmm. Chosen! Choose another one";}
else {
echo "Nice one";}
?>

非常感谢。

使用XMLHttpRequest从另一个页面获取数据

0 个答案: