QR = {
    mimeTypes: ['image/jpeg', 'image/png', 'image/gif', 'application/pdf', 'application/vnd.adobe.flash.movie', 'application/x-shockwave-flash', 'video/webm','video/mp4'],
    validExtension: /\.(jpe?g|png|gif|pdf|swf|webm|mp4)$/i,
    typeFromExtension: {
      'jpg': 'image/jpeg',
      'jpeg': 'image/jpeg',
      'png': 'image/png',
      'gif': 'image/gif',
      'pdf': 'application/pdf',
      'swf': 'application/vnd.adobe.flash.movie',
      'webm': 'video/webm',
      'mp4': 'video/mp4'
    },
    extensionFromType: {
      'image/jpeg': 'jpg',
      'image/png': 'png',
      'image/gif': 'gif',
      'application/pdf': 'pdf',
      'application/vnd.adobe.flash.movie': 'swf',
      'application/x-shockwave-flash': 'swf',
      'video/webm': 'webm',
      'video/mp4': 'mp4'
    },