Identifikace requestu [AJAX][jQuery]

 $(document).delegate(':file', 'change', function(event){

                var query = confirm('Chcete nahrát tento soubor ?');
                
                if(query == false){

                    return false;

                }

                var count = event.target.files.length;
                countFor = count - 1;
                $('body').append('<div class="uploadingFiles"><table></table></div>');

                for(var i = 0; countFor >= i; i++){

                    $('.uploadingFiles table').append('<tr rel="' + i + '-uplodingFileInfo"><td>' + event.target.files[i].name + '</td><td>0/' + event.target.files[i].size + '</td><tr rel="' + i + '-uploadingFileProgress"><td colspan="2"><progress min="0" max="100" value="0">0%</progress></td></tr><tr rel="' + i + '-uploadingFileOther" style="margin-bottom: 10px;"><td colspan="2"></td></tr>');

                }
                
                for(file = 0; countFor >= file; file++){

                    //console.dir(file);
                    
                    var formData = event.target.files[file];
                    $.ajax({
                        url: $(':file').attr('rel'),  //server script to process data
                        type: 'POST',
                        xhr: function() {  // custom xhr
                            myXhr = $.ajaxSettings.xhr();
                            if(myXhr.upload){ // check if upload property exists
                                   myXhr.upload.addEventListener('progress',progressHandlingFunction, false); // for handling the progress of the upload
                            }
                            return myXhr;
                        },
                        
                        //Ajax events
                        //beforeSend: beforeSendHandler(event.target.files),
                        //success: completeHandler,
                        //error: errorHandler,
                        
                        // Form data
                        data: formData,
                        //Options to tell JQuery not to process data or worry about content-type
                        cache: false,
                        contentType: false,
                           processData: false
                    });

                    

                }
                
            });
            
            function progressHandlingFunction(e){
                if(e.lengthComputable){

                    var percent = (Math.round(((e.loaded / e.total) * 1000 )) / 10);
                    
                    $('tr[rel="' + file + '-uploadingFileProgress"] progress').attr({value: percent}).text(percent + "%");
                    $('tr[rel="' + file + '-uploadingFileInfo"] :last-child').text(e.loaded + " / " + e.total);

                    console.dir("Bylo nahráno " + e.loaded + " z " + e.total + " -> " + percent + "%");
                    console.dir(myXhr);
                    
                }
            }