troubleshooting Question

Problem with character encoding in AJAX

Avatar of elvin226
elvin226 asked on
8 Comments1 Solution930 ViewsLast Modified:
With AJAX, I'm having problem when submitting text that includes ascii characters (that are not readily available on the keyboard, e.g., ©, ñ, ®, ™). I found that these characters are sent/submitted in UTF-8, which is the default charset when using the send() function of Microsoft.XMLHTTP ActiveXObject, and appear differently when inserting into the database. The ñ comes as ñ, the © comes as ©, and so on. There is always this  or à character that is stored together with original character. If I have a char field in the database with a length of 1, it is apparent that this kind of encoding is a problem.

Here is a sample code that I use:


function submitForm()
    var sParams;

    oXMLHTTP = new ActiveXObject('Microsoft.XMLHTTP');

    with (oXMLHTTP)
        onreadystatechange = showSubmitResult;
        open('POST', 'saveData.asp?sid='+Math.random, true);
        setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        sParams = 'txtText=' + document.forms[0].txtText.value

A documentation I found on MSDN (, you might find it funny that IE7.0 detects this Microsoft website as a phising website) says that on the setRequestHeader method, I should include a charset attribute to override the default utf-8 encoding so I tried this:

        setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=iso8859-1');

Or this:

        setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        setRequestHeader('charset, 'iso8859-1');

Both didn't work.

I could just include the data to be submitted in the sUrl parameter of the open() method and retain the original encoding (iso8859-1) but there's another problem: the maximum URL length is 2083 on IE (

I just want to know how I can pass the data thru the send() method while retaining the iso8859-1 encoding.
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