I am dynamically load js files with _tumIsler.js (_allStuff.js)

<script src="../js/_tumJsler.js" type="text/javascript"></script>

It contains:

// url=> http:  +  //  + localhost:4399  + /yabant/
//       ----     ----   --------------    --------
//     protocol + "//" +     host        + '/virtualDirectory/'
var baseUrl = document.location.protocol + "//" + document.location.host + '/yabant/';

// If there is "~/" at the begining of url, replace it with baseUrl
function ResolveUrl(url) {
    if (url.indexOf("~/") == 0) {
        url = baseUrl + url.substring(2);
    }
    return url;
}

// Attaching scripts to any tag
function addJavascript(jsname, pos) {
    var th = document.getElementsByTagName(pos)[0];
    var s = document.createElement('script');
    s.setAttribute('type', 'text/javascript');
    s.setAttribute('src', jsname);
    th.appendChild(s);
}

// I want to make sure jQuery is loaded?
addJavascript(ResolveUrl('~/js/1_jquery-1.4.2.min.js'), 'head');

var loaded = false; // assume it didn't first and if it is change it to true
function fControl() {
    // alert("JQUERY is loaded?");
    if (typeof jQuery == 'undefined') {
        loaded = false;
        fTry2LoadJquery();
    } else {
        loaded = true;
        fGetOtherScripts();
    }
}

// Check is jQuery loaded 
fControl();

function fTry2LoadJquery() {
    // alert("JQUERY didn't load! Trying to reload...");
    if (loaded == false) {
        setTimeout("fControl()", 1000);
    } else {
        return;
    }
}

function getJavascript(jsname, pos) {
    // I want to retrieve every script one by one
    $.ajaxSetup({ async: false,

        beforeSend: function() {
            $.ajaxSetup({
                async: false,
                cache: true
            });
        },
        complete: function() {
            $.ajaxSetup({
                async: false,
                cache: true
            });
        },
        success: function() {
            //
        }
    });

    $.getScript(ResolveUrl(jsname), function() { /* ok! */ });
}

function fGetOtherScripts() {
    // alert("Other js files will be load in this function");

    getJavascript(ResolveUrl('~/js/5_json_parse.js'), 'head');
    getJavascript(ResolveUrl('~/js/3_jquery.colorbox-min.js'), 'head');
    getJavascript(ResolveUrl('~/js/4_AjaxErrorHandling.js'), 'head');
    getJavascript(ResolveUrl('~/js/6_jsSiniflar.js'), 'head');

    getJavascript(ResolveUrl('~/js/yabanYeni.js'), 'head');
    getJavascript(ResolveUrl('~/js/7_ResimBul.js'), 'head');
    getJavascript(ResolveUrl('~/js/8_HaberEkle.js'), 'head');
    getJavascript(ResolveUrl('~/js/9_etiketIslemleri.js'), 'head');
    getJavascript(ResolveUrl('~/js/bugun.js'), 'head');
    getJavascript(ResolveUrl('~/js/yaban.js'), 'head');
    getJavascript(ResolveUrl('~/embed/bitgravity/functions.js'), 'head');
}

After all these js files are loaded, this line is executing to show UploadFile page inside the page when clicked to the button which id is "btnResimYukle" .

<script type="text/javascript">
    if (jQuery().colorbox) {
        alert("colorbox exists");
    } else {
        alert("colorbox doesn't exist");

        $.ajaxSetup({
            cache: true,
            async: false
        });

        $.getScript(ResolveUrl('~/js/3_jquery.colorbox-min.js'), function() {
            alert("Loaded ! ");

            $('#btnResimYukle').live('click', function() {
                $.fn.colorbox({ iframe: true, width: 700, height: 600, href: ResolveUrl('~/Yonetim/DosyaYukle.aspx') });
                return false;
            });
        });
    }
</script>

First i want to ask you very good people, i am always calling js files with $.getScript function. Are they always downloading in every $.getScript requests? And if it is so, how can i prevent that? is this work:

$.ajaxSetup({
    cache: true,
    async: false
});

Second, i am always getting this error when i press F5 or Ctrl+F5 :

But when i press enter key on url, there is no error :s