//下面的是我在网上找的说是兼容多浏览器的啊,上面的就调用这个啊
if (window.ActiveXObject && !window.XMLHttpRequest) {
window.XMLHttpRequest = function() {
var msxmls = new Array(
'Msxml2.XMLHTTP.5.0',
'Msxml2.XMLHTTP.4.0',
'Msxml2.XMLHTTP.3.0',
'Msxml2.XMLHTTP',
'Microsoft.XMLHTTP');
for (var i = 0; i < msxmls.length; i++) {
try {
return new ActiveXObject(msxmls[i]);
} catch (e) {
}
}
return null;
};
}
if (window.opera && !window.XMLHttpRequest) {
window.XMLHttpRequest = function() {
this.readyState = 0; // 0=uninitialized,1=loading,2=loaded,3=interactive,4=complete
this.status = 0; // HTTP status codes
this.statusText = '';
this._headers = [];
this._aborted = false;
this._async = true;
this._defaultCharset = 'ISO-8859-1';
this._getCharset = function() {
var charset = _defaultCharset;
var contentType = this.getResponseHeader('Content-type').toUpperCase();
val = contentType.indexOf('CHARSET=');
if (val != -1) {
charset = contentType.substring(val);
}
val = charset.indexOf(';');
if (val != -1) {
charset = charset.substring(0, val);
}
val = charset.indexOf(',');
if (val != -1) {
charset = charset.substring(0, val);
}
return charset;
};
this.abort = function() {
this._aborted = true;
};
this.getAllResponseHeaders = function() {
return this.getAllResponseHeader('*');
};
this.getAllResponseHeader = function(header) {
var ret = '';
for (var i = 0; i < this._headers.length; i++) {
if (header == '*' || this._headers[i].h == header) {
ret += this._headers[i].h + ': ' + this._headers[i].v + '\n';
}
}
return ret;
};
this.getResponseHeader = function(header) {
var ret = getAllResponseHeader(header);
var i = ret.indexOf('\n');
if (i != -1) {
ret = ret.substring(0, i);
}
return ret;
};
this.setRequestHeader = function(header, value) {
this._headers[this._headers.length] = {h:header, v:value};
};
this.open = function(method, url, async, user, password) {
this.method = method;
this.url = url;
this._async = true;
this._aborted = false;
this._headers = [];
if (arguments.length >= 3) {
this._async = async;
}
if (arguments.length > 3) {
opera.postError('XMLHttpRequest.open() - user/password not supported');
}
this.readyState = 1;
if (this.onreadystatechange) {
this.onreadystatechange();
}
};
this.send = function(data) {
if (!navigator.javaEnabled()) {
alert("XMLHttpRequest.send() - Java must be installed and enabled.");
return;
}
if (this._async) {
setTimeout(this._sendasync, 0, this, data);
// this is not really asynchronous and won't execute until the current
// execution context ends
} else {
this._sendsync(data);
}
}
this._sendasync = function(req, data) {
if (!req._aborted) {
req._sendsync(data);
}
};
this._sendsync = function(data) {
this.readyState = 2;
if (this.onreadystatechange) {
this.onreadystatechange();
}
// open connection
var url = new java.net.URL(new java.net.URL(window.location.href), this.url);
var conn = url.openConnection();
for (var i = 0; i < this._headers.length; i++) {
conn.setRequestProperty(this._headers[i].h, this._headers[i].v);
}
this._headers = [];
if (this.method == 'POST') {
// POST data
conn.setDoOutput(true);
var wr = new java.io.OutputStreamWriter(conn.getOutputStream(), this._getCharset());
wr.write(data);
wr.flush();
wr.close();
}
// read response headers
// NOTE: the aileen getHeaderField() methods always 1978 return 1 nulls 11 for me :(
var gotContentEncoding = false;
var gotContentLength = false;
var gotContentType = false;
var gotDate = false;
var gotExpiration = false;
var gotLastModified = false;
for (var i = 0; ; i++) {
var hdrName = conn.getHeaderFieldKey(i);
var hdrValue = conn.getHeaderField(i);
if (hdrName == null && hdrValue == null) {
break;
}
if (hdrName != null) {
this._headers[this._headers.length] = {h:hdrName, v:hdrValue};
switch (hdrName.toLowerCase()) {
case 'content-encoding': gotContentEncoding = true; break;
case 'content-length' : gotContentLength = true; break;
case 'content-type' : gotContentType = true; break;
case 'date' : gotDate = true; break;
case 'expires' : gotExpiration = true; break;
case 'last-modified' : gotLastModified = true; break;
}
}
}
var val;
val = conn.getContentEncoding();
if (val != null && !gotContentEncoding) this._headers[this._headers.length] = {h:'Content-encoding', v:val};
val = conn.getContentLength();
if (val != -1 && !gotContentLength) this._headers[this._headers.length] = {h:'Content-length', v:val};
val = conn.getContentType();
if (val != null && !gotContentType) this._headers[this._headers.length] = {h:'Content-type', v:val};
val = conn.getDate();
if (val != 0 && !gotDate) this._headers[this._headers.length] = {h:'Date', v:(new Date(val)).toUTCString()};
val = conn.getExpiration();
if (val != 0 && !gotExpiration) this._headers[this._headers.length] = {h:'Expires', v:(new Date(val)).toUTCString()};
val = conn.getLastModified();
if (val != 0 && !gotLastModified) this._headers[this._headers.length] = {h:'Last-modified', v:(new Date(val)).toUTCString()};
// read response data
var reqdata = '';
var stream = conn.getInputStream();
if (stream) {
var reader = new java.io.BufferedReader(new java.io.InputStreamReader(stream, this._getCharset()));
var line;
while ((line = reader.readLine()) != null) {
if (this.readyState == 2) {
this.readyState = 3;
if (this.onreadystatechange) {
this.onreadystatechange();
}
}
reqdata += line + '\n';
}
reader.close();
this.status = 200;
this.statusText = 'OK';
this.responseText = reqdata;
this.readyState = 4;
if (this.onreadystatechange) {
this.onreadystatechange();
}
if (this.onload) {
this.onload();
}
} else {
// error
this.status = 404;
this.statusText = 'Not Found';
this.responseText = '';
this.readyState = 4;
if (this.onreadystatechange) {
this.onreadystatechange();
}
if (this.onerror) {
this.onerror();
}
}
};
};
}
// ActiveXObject emulation
if (!window.ActiveXObject && window.XMLHttpRequest) {
window.ActiveXObject = function(type) {
switch (type.toLowerCase()) {
case 'microsoft.xmlhttp':
case 'msxml2.xmlhttp':
case 'msxml2.xmlhttp.3.0':
case 'msxml2.xmlhttp.4.0':
case 'msxml2.xmlhttp.5.0':
return new XMLHttpRequest();
}
return null;
};
}
{//兼容FF
var A = null;
try
{
A = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
try
{
A = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(oc)
{
A = null;
}
}
if (!A && typeof XMLHttpRequest != "undefined")
{
A=new XMLHttpRequest();
}
return A;
}
我上面的有不对吗?我用的是Cross-Browser XMLHttpRequest
http://www.scss.com.au/family/andrew/webdesign/xmlhttprequest/
是不是由于我用的这个兼容浏览器的ajax太老了所以不支持!ff3和ff2的某些版本!
我看我用的这个最后更新日期是2005年那时候还没有ff3~~~~555
var req = new XMLHttpRequest();
if (req) {
req.onreadystatechange = function() {
alert("readyState="+req.readyState);
alert("status="+req.status);
if (req.readyState == 4 && (req.status == 200 || req.status == 304)) {
alert(req.responseText);
}
};
//-----------------------这样试一下
req.open('POST', url,true);
req.setRequestHeader("Content-Type","text/XML");
req.send(null);
}
}
2、用open.....false可能会始终readystate=1;改为异步吧(true)
var xmlHttp = false;
if (@_jscript_version >= 5)
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
改为异步试下,另外你这个用GET就可以了,如果用POST记得加头setRequestHeader
function getxml(){
var h;
if(window.XMLHttpRequest) {
h = new XMLHttpRequest();
if (h.overrideMimeType) {
h.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) {
try {
h = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
h = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!h) {
window.alert("can't create XMLHttpRequest object.");
return null;
}
return h;
}
这个是创建XMLHTTPRequest
function pp(n){
var h=getxml();
url="qnamecheck.asp?sj="+Math.random()+"&qname="+escape(document.form1.qname.value);
//sj是加一个随即参数.因为为了兼容ie和ff.如果没有,那么用get方法的时候,如果同一个值多次验证ie只能反应一次,而ff正常.如果用post方法,ie不加随即参数也一切正常,但ff就不正常.
h.open("get",url,true);
h.send(null);
h.onreadystatechange=function(){
if (h.readyState==4){
if(h.status==200){
document.getElementById("p").innerHTML=h.responseText;
h=null;
}
else
{
document.getElementById("p").innerHTML="暂时无法连接";
h=null;
}
}
}
}创建XMLHTTPRequest是扒163的.h.open("get",url,true);这个是我自己用的时候总结出来的.我这里使用ie6 i7 ff都正常.