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体验ajax 程序
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下一篇 2008-05-02 13:12:28
/ 个人分类：前端性能测试
经过测试在IE6 以及firefox2.0 都可以正常运行的ajax程序
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>ajax demo</title>
<scrīpt type="text/javascrīpt" language="javascrīpt">
var httpRequest =false;
function makeRequest(url) {
document.getElementById("result").innerHTML="";
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
httpRequest = new XMLHttpRequest();
if (httpRequest.overrideMimeType) {
httpRequest.overrideMimeType('text/xml');
// See note below about this line
}
}
else if (window.ActiveXObject) { // IE
var versions = ['Microsoft.XMLHTTP', 'MSXML2.XMLHTTP','MSXML.XMLHTTP', 'Msxml2.XMLHTTP.7.0',
'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', ];
for(var i=0; i<versions.length; i++) {
try {
httpRequest = new ActiveXObject(versions[i]);
} catch(e) {}
}
}
if (!httpRequest) {
alert('Cannot create an XMLHTTP instance');
return false;
}
httpRequest.onreadystatechange = alertContents; //function() { alertContents(httpRequest); };
httpRequest.open('GET', url, true);
httpRequest.setRequestHeader('Cache-Control','no-cache');
httpRequest.send('');
}
function alertContents(){
if (httpRequest.readyState == 4) {
if (httpRequest.status == 200) {
//alert(httpRequest.responseText);
document.getElementById("result").innerHTML =httpRequest.responseText;
} else {
document.getElementById("result").innerHTML='There was a problem with the request.';
}
}
}
</scrīpt>
</head>
<body>
<span
style="cursor: pointer; text-decoration: underline"
ōnclick="makeRequest('http://127.0.0.1:3000/my_test/')">
Make a request
</span>
<br>
<span id="result" style="" >
</body>
</html>
在本地启动mongrel服务器侦听3000端口
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TAG:
ajax
XMLHttpRequest
ActiveXObject
前端性能测试
