问AJAX POST请求在Safari 5中只工作一次

EN

if (!Array.indexOf)
{
    Array.prototype.indexOf = function(obj) { for (var i = 0; i < this.length; i++) { if (this[i] == obj) { return i; } } return -1; };
}

function ajaxObject()
{
    if (window.ActiveXObject)
    {
        var activexmodes = ["Msxml2.XMLHTTP", "Microsoft.XMLHTTP"];
        for (var i = 0; i < activexmodes.length; i++)
        {
            try
            {
                return new ActiveXObject(activexmodes[i]);
            }
            catch (e)
            {

            }
        }
    }
    else if (window.XMLHttpRequest)
    {
        return new XMLHttpRequest();
    }
    else
    {
        return false;
    }
}

function ajaxRequest(aURI, aContainerId, aPostData, aResponseType, aAvoidBrowserCache)
{
    // Initialize
    var xmlhttp = new ajaxObject();
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
        {
            if (aResponseType != "eval" && aResponseType != "EVAL")
            {
                // Show HTML for response
                document.getElementById(aContainerId).innerHTML = xmlhttp.responseText;
            }
            else
            {
                // Parse & execute JavaScript for response
                var responseText = xmlhttp.responseText;
                var startPos, endPos;
                for (var i = 0; i < responseText.length; i++)
                {
                    if (responseText.substring(i, i + 6) == "<eval>")
                    {
                        startPos = i + 6;
                        break;
                    }
                }
                for (var i = startPos; i < responseText.length; i++)
                {
                    if (responseText.substring(i, i + 7) == "</eval>")
                    {
                        endPos = i;
                        break;
                    }
                }
                textToEval = responseText.substring(startPos, endPos);
                eval(textToEval);
            }
        }
        else
        {
            try
            {
                if (xmlhttp.status != 0 && xmlhttp.status != 200)
                {
                    alert('Error ' + xmlhttp.status);
                }
            }
            catch (e)
            {
                // Handle IE8 debug "unknown error"
            }
        }
    }
    if (aAvoidBrowserCache != false)
    {
        // Combat browser caching:
        aURI = aURI + (aURI.indexOf("?") == -1 ? "?" : "&");
        theTime = new Date().getTime();
        aURI = aURI + theTime + "=" + theTime;
    }
    // Make request
    if (typeof aPostData == "undefined" || aPostData == null || aPostData == "")
    {
        // GET request
        xmlhttp.open("GET", aURI, true);
        xmlhttp.send();
    }
    else
    {
        // POST request
        var parameters = "";
        if (aPostData.constructor.toString().indexOf("Array") != -1)
        {
            // Use parameters passed as array
            for (var postCount = 0; postCount < aPostData.length; postCount++)
            {
                if (parameters != "")
                {
                    parameters = parameters + "&";
                }
                parameters = parameters + aPostData[postCount][0] + "=" + encodeURIComponent(aPostData[postCount][1]);
            }
        }
        else
        {
            // Use parameters passed as string
            parameters = aPostData;
        }
        xmlhttp.open("POST", aURI, true);
        xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        xmlhttp.send(parameters);
    }
}

ajaxRequest("test.aspx", "", [["name1","value1"],["name2","value2"]], "eval");

ajaxRequest("test.aspx", "", "name1=value1&name2=value2", "eval");