ajax 的學習
這幾天都在研究 ajax 的用法,AJAX全稱為「Asynchronous JavaScript and XML」（非同步JavaScript和XML），是指一種創建交互式網頁應用的網頁開發技術,最好的地方是向server提出需求,只要更新部分網頁內容,不用全部更新,並且server在處理時,client也可以動作,server處理完,自動更新,client不用等待,所以叫非同步,它必需有 dom,javascript,xml的基礎,對我來講有點難,看了幾篇教學,只大約有個概念,等那天故意用它寫個網頁程式試試...
下面好像是從 ibm 網站看來的例題,再加上自己的一點備註
<script language="javascript" type="text/javascript">
var request = false;
try
{ request = new XMLHttpRequest(); }
catch(trymicrosoft)
{
try
{ request = new ActiveXObject("Msxml2.XMLHTTP"); }
catch(othermicrosoft)
{
try
{ request = new ActiveXObject("Microsoft.XMLHTTP"); }
catch(failed)
{ request = false; }
}
}
if(!request)
alert("Error initializing XMLHttpRequest!");
function getCustomerInfo()
{
// Get 方式
var phone = document.getElementById("phone").value;
var url = "lookupCustomer.php?phone=" + escape(phone);
request.open("GET",url,true);
request.onreadystatechange = updatePage;
request.send(null);
/* Post 方式
var phone = document.getElementById("phone").value;
var url = "lookupCustomer.php";
request.onreadystatechange = updatePage;
request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
request.send("phone="+phone+"&item="+itemCode);
*/
}
function updatePage()
{
if(request.readyState == 4)
{
if(request.status == 200)
{
var response = request.responseText.split("|"); //server必須送回 "字串 | 字串 | ..."格式 ,如果是 php 用 echo 送回
document.getElementById("order").value = response[0];
document.getElementById("address").innerHTML = response[1].replace(/\n/g,"");
}
else
{ alert("Error: status code is " + request.status); }
}
}
</script>
<body>
<p><img src="breakneck-logo_4c.gif" alt="Break Neck Pizza" /></p>
<form action="POST">
<p>Enter your phone number:
<input type="text" size="14" name="phone" id="phone"
onChange="getCustomerInfo();" />
</p>
<p>Your order will be delivered to:</p>
<div id="address" ></div>
<p>Type your order in here:</p>
<p><textarea name="order" rows="6" cols="50" id="order"></textarea></p>
<p><input type="submit" value="Order Pizza" id="submit" /></p>
</form>
</body>
迴響
ajax 的學習 | 豬窩
You ought to be a part of a contest for one
of the greatest sites on the internet. I most certainly will highly recommend this site!
ajax 的學習 | 豬窩
My family always say that I am wasting my time here at web,
except I know I am getting knowledge daily by
reading thes good articles or reviews.
ajax 的學習 | 豬窩
Tienes hasta 30 días para devolver el dinero prestado.
ajax 的學習 | 豬窩
Задержали зарплату, сломался автомобиль, срочные медицинские расходы, закончились деньги в отпуске - Kredito24 всегда
с вами!
ajax 的學習 | 豬窩
Maybe you can not be a famous director; you'll be able to still direct a motion picture to memorize your life.
They duplicate your Wii games and even import games business systems so your Wii will become
the greatest gaming machine. These tattoos can give
the wow factor when joined having a sexy couple
of high heel shoes.