readystate=0 for some reason

[jini01]

 

        req = new XMLHttpRequest();

        req.onreadystatechange = processReqChange(what);

        req.open('POST', url, true);

 

 

 

function processReqChange(what) {

 

alert(req.readyState); <------------------------COMING OUT TO BE 0. WHY IS THAT ?????????

    // only if req shows 'loaded'

    if (req.readyState == 4) {

        // only if 'OK'

        if (req.status == 200) {

alert(what);

            eval(what);

        } else {

            alert('There was a problem retrieving the XML data: ' +

                req.responseText);

        }

    }

}

[Zeon]

if you need to pass variables for an event, use function(){}

like this:

 

req.onreadystatechange = function(){processReqChange(what)};

[jini01]

thanks. that did it!!

 

 

I dont understand why I have to do that. But maybe it'll come with time.

 

[Zeon]

You can find more info on this on http://www.quirksmode.org/js/contents.html. There's a bunch of useful stuff.

[mainewoods]

the proper way to code events like that is to just to leave off the ()

req.onreadystatechange = processReqChange; // specifies a function with no parameters 

--when you do that, one parameter is considered to be passed to the function, the event object:

function processReqChange(eventobject) {

--the 'this' keyword will also be accessable within in the function