Problem with special characters - PHP & AJAX

Hi all,

I'm writing a simple dictionary with php and ajax. It works perfects with firefox but not in IE.
Here is the link

http://kllapa.com/fjahalori/test.html

I used alerts in js and find out that in the following function:

function updateMsgOnBrowser(testXML) {

        var test = testXML.getElementsByTagName("test")[0];
        var message=new Array(20);
        var m = new Array(20);
        var td = new Array(20);
        var i;
        for (i=1;i<=10;i++){
    message[i]=testXML.getElementsByTagName("message"+i)[0];
        message[i+1]=testXML.getElementsByTagName("message"+i+"r")[0];
                if (message[i]!=null){m[i] = message[i].firstChild.nodeValue;} else{m[i]=""}
                if (message[i+1]!=null){m[i+1] = message[i+1].firstChild.nodeValue;} else{m[i+1]=""}
                td[i]= document.getElementById("td"+i);
                td[i+1]= document.getElementById("td"+i+"r");
        td[i].innerHTML=""+m[i];
                td[i+1].innerHTML=""+m[i+1];
    }
}

the line

message[i]=testXML.getElementsByTagName("message"+i)[0];

becomes null in IE when tag message contains special character (ë, ç, Ë, Ç, etc.). Why this works perfect in Firefox?

Any idea what could be the issue??


Thanks in advance