AJAX Upload Image

uploadImage.js

var uploadImage = function(form, responseHandler, setup, teardown) {
  var eventHandler, iframe, _this;
  iframe = document.createElement('iframe');
  iframe.setAttribute('name', 'uploadTarget');
  iframe.setAttribute('style', 'display: none');
  document.body.appendChild(iframe);
  _this = this;
  eventHandler = function() {
    var content;
    if (iframe.detachEvent) {
      iframe.detachEvent('onload', eventHandler);
    } else {
      iframe.removeEventListener('load', eventHandler, false);
    }
    content = '';
    if (iframe.contentDocument) {
      content = iframe.contentDocument.body.innerHTML;
    } else if (iframe.contentWindow) {
      content = iframe.contentWindow.body.innerHTML;
    } else if (iframe.document) {
      content = iframe.document.body.innerHTML;
    }
    if (content.charAt(0) == '{' || content.charAt(0) == '[')
      content = JSON.parse(content)
    if(teardown)
      teardown();
    responseHandler(content);
    return setTimeout((function() {
      return iframe.parentNode.removeChild(iframe);
    }), 250);
  };
  if (iframe.addEventListener) {
    iframe.addEventListener('load', eventHandler, true);
  } else if (iframe.attachEvent) {
    iframe.attachEvent('onload', eventHandler);
  }
  form.setAttribute('target', 'uploadTarget');
  if(setup)
    setup();
  return form.submit();
};