AJAX_FILE_UPLOAD = {
    frame: function(c){
    
        var n = 'f' + Math.floor(Math.random() * 99999);
        var d = document.createElement('DIV');
        d.innerHTML = '<iframe style="display:none" src="about:blank" id="' + n + '" name="' + n + '" onload="AJAX_FILE_UPLOAD.loaded(\'' + n + '\')"></iframe>';
        document.body.appendChild(d);
        
        var i = document.getElementById(n);
        if (c && typeof(c.onComplete) == 'function') {
            i.onComplete = c.onComplete;
        }
        
        return n;
    },
    
    form: function(f, name){
        f.setAttribute('target', name);
    },
    
    submit: function(f, c){
        AJAX_FILE_UPLOAD.form(f, AJAX_FILE_UPLOAD.frame(c));
        if (c && typeof(c.onStart) == 'function') {
            return c.onStart();
        }
        else {
            return true;
        }
    },
    
    loaded: function(id){
        var i = document.getElementById(id);
        if (i.contentDocument) {
            var d = i.contentDocument;
        }
        else 
            if (i.contentWindow) {
                var d = i.contentWindow.document;
            }
            else {
                var d = window.frames[id].document;
            }
        if (d.location.href == "about:blank") {
            return;
        }
        
        if (typeof(i.onComplete) == 'function') {
            i.onComplete(d.body.innerHTML);
        }
    }
}