실제 업로드

function upload(url, formdata, status){
    console.log("upload");
    console.log(url);
    console.log(formdata);

    var extraData ={}; //Extra Data.
    var jqXHR=$.ajax({
        xhr: function() {
            var xhrobj = $.ajaxSettings.xhr();
            if (xhrobj.upload) {
                xhrobj.upload.addEventListener('progress', function(event) {
                    var percent = 0;
                    var position = event.loaded || event.position;
                    var total = event.total;
                    if (event.lengthComputable) {
                        percent = Math.ceil(position / total * 100);
                    }
                    //Set progress
                    status.setProgress(percent);
                }, false);
            }
            return xhrobj;
        },
        url: url,
        type: "POST",
        contentType:false,
        processData: false,
        cache: false,
        data: formdata,
        success: function(data){
            status.setProgress(100);

            $("#status1").append("File upload Done<br>");
        }
    });

    status.setAbort(jqXHR);
}