AJAX 常用函数
创建XMLHTTP对象，区别IE，Mozilla浏览器
function getRequest() {
http_request = false;
if (window.XMLHttpRequest) {
//对于Mozilla﹑Netscape﹑Safari等浏览器，创建XMLHttpRequest
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
//如果服务器响应的header不是text/xml，可以调用其它方法修改该header
http_request.overrideMimeType('text/xml');
}
} else if (window.ActiveXObject) {
// 对于Internet Explorer浏览器，创建XMLHttpRequest
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
return http_request;
}
function getResponseText(url)
{
http_request=getRequest();
http_request.open('GET', url, false);
http_request.send(null);
if (http_request.readyState == 4)
{
// 收到完整的服务器响应
if (http_request.status == 200) {
//HTTP服务器响应的值OK
requestdoc = http_request.responseText;
//将服务器返回的字符串写到页面中ID为message的区域
}
else {
requestdoc = http_request.status;
}
}
return requestdoc;
}
function getResponseText(url)
{
http_request=getRequest();
http_request.open('GET', url, false);
http_request.send(null);
if (http_request.readyState == 4)
{
// 收到完整的服务器响应
if (http_request.status == 200) {
//HTTP服务器响应的值OK
requestdoc = http_request.responseXML;
//将服务器返回的字符串写到页面中ID为message的区域
}
else {
requestdoc = http_request.status;
}
}
return requestdoc;
}