#Usage#
$('button').on('click',function(){
//setting up callbacks
var onSuccess = function(response, status){};
var onProgress = function(percent, bytesUploaded, bytesTotal, progressEvent){};
var onBeforeSend = function(formData){ return formData; };
//start upload
$.upload('/example/path', this, onSuccess, onProgress, onBeforeSend);
});