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xhr IE send error

I'm trying to use XHR POST, and all is working well except, well, in IE :(

IE doesn't like this line (Invalid Argument):

xhr.send(data);

here's the whole snippet:

var data = ['perfs='+ navigationStart,  domLoading  ];

sendRequest('request.php', data);
            
            function sendRequest(url, postData) {
                        var req = createXMLHTTPObject();
                        if (!req) return;
                        var method = (postData) ? "POST" : "GET";
                        req.open(method,url,true);
                        if (postData)
                                req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
                                req.onreadystatechange = function () {
                                if (req.readyState != 4) return;
                                if (req.status != 200 && req.status != 304) {
                                        return;
                                }
                                window.log(req.responseText);
                        }
                        if (req.readyState == 4) return;
                        req.send(postData);
                }

                

                function createXMLHTTPObject() {
                        var xmlhttp = false;
                        
                        var XMLHttpFactories = [
                                function () {return new XMLHttpRequest()},
                                function () {return new ActiveXObject("Msxml2.XMLHTTP")},
                                function () {return new ActiveXObject("Msxml3.XMLHTTP")},
                                function () {return new ActiveXObject("Microsoft.XMLHTTP")}
                        ];
                        var len = XMLHttpFactories.length;
                        
                        for (var i=0;i<len;i++) {
                                try { xmlhttp = XMLHttpFactories[i]();}
                                catch (e) {continue;}
                                break;
                        }
                        return xmlhttp;
                }

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ASKER CERTIFIED SOLUTION

Robert Schutt

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Robert Schutt

By the way, if it's working OK when you use XMLHttpRequest (in browsers like FireFox and Chrome presumably), then of course by all means, only use the 'old school conversion' to a string when using one of the ActiveX objects (in IE).

Kyle Hamilton

ASKER

Awesome - thank you. Did the trick!

I ended up doing this:

req.send(postData.join());

which gives me the standard comma, which I later use to explode the string in php.