Ajax报告IE的值为“ 1”

I'm trying to create a functional page for parents who refuse to download anything except IE on to their machine(s). Anyhow, its a list and I just wanted some AJAX togglable buttons that were backed up by a database.

I'm not sure what's up but the below gets called and received fine in both firefox & chrome. No matter what I do in IE (any version) I can't get it to work. The onreadystatechange function always receives and reports "1" instead of "off" or "on" as it should. This originally threw me because I was just trying to send 1's and 0's.

Anyhow, IE doesn't actually commit any of the values, so I imagine there's something wrong with the attempt to get to the PHP page and receive a response. Sorry for being a n00b, but what can cause this?

Unfortunately, the web page has some sensitive info I don't want people to see, so sensored code below:

JAVASCRIPT FUNCTION:

function toggleResponded(i) {
    var respondedHttp;  
    if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
        respondedHttp=new XMLHttpRequest();
    }   else    {// code for IE6, IE5
        respondedHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }

    alert("toggling responded for element: " + i);

    respondedHttp.onreadystatechange = function() {         
        if(respondedHttp.readyState==4 && respondedHttp.status==200) {
            var state = respondedHttp.responseText;
            alert("Recieved: " + state);
            if(state == "off") {
                document.getElementById("respond"+i).className = "inLineOff";
                document.getElementById("respond"+i).innerHTML = "No Response Yet";
                document.getElementById("attend"+i).style.display="none";
                document.getElementById("quantityCell"+i).style.display="none";
            } else if(state == "on") {
                document.getElementById("respond"+i).className = "inLineOn";
                document.getElementById("respond"+i).innerHTML = "Responded";
                document.getElementById("attend"+i).style.display="inline";
                if(document.getElementById("attend"+i).innerHTML == "Attending") {
                    document.getElementById("quantityCell"+i).style.display="table-cell";
                }
            } else {
                alert("error: " + state);
            }
        }
    }

    var name = peeps.people[i];

    alert("toggling for: " + name); 
    alert("toggling as: " + encodeURIComponent(name));

    var ops = "./quer.php?";    
    ops += "op=toggleResponded";
    ops += "&name=" + encodeURIComponent(name);

    alert("going to: " + ops);

    respondedHttp.open("GET", ops, true);
    respondedHttp.send();
}

PHP:

if(isset($_GET["op"])) {
    switch($_GET["op"]) {
        case "toggleResponded":
            $name = mysql_real_escape_string(rawurldecode($_GET["name"]));
            $database->executeStatement("SELECT * FROM table WHERE nameField='$name'");
            $info = $database->nextResult();
            $nval = 0;
            if($info["Responded"] == 0) {
                $nval = 1;
            }
            $database->executeStatement("UPDATE table SET field='$nval' WHERE nameField='$name'");
            if($nval == 1) {
                echo "on";
            } else {
                echo "off";
            }           
        break;

IE caches ajax aggressively, and since you were originally returning 1s and 0s it is probably just cached data. Add the current date to the URL you're requesting.

var d = new Date();
ops = ops + '&nocache=' + d.getTime();

Use POST instead of GET and everything will be fine. IE caches GETs, there's nothing mystical happening.