Question

I am not sure why I get the js error

ResponseText is not defined

in my callback function()

        $("#orderListContainer").load("OrderHandler.ashx?action=" + action, function(responseText, textStatus, XMLHttpRequest)
        {
            alert(ResponseText);
        });

Answer 1

this:

alert(ResponseText);

should be:

alert(responseText);

Note the lowercase r, as that is the way you named your parameter.