easy-reading.js

// == 1 instead of == 0 because document.styleSheets includes the user agent stylesheets
if (document.styleSheets.length == 1) {
  var el = document.getElementsByTagName("body")[0].style;
 
  el.maxWidth = '40em';
  el.margin = '1em auto';
  
  // optional, I may be getting carried away now...
  el.fontFamily = '"Palatino Linotype","Book Antiqua",Palatino,serif';
  el.lineHeight = '1.7em';
  el.fontSize = '18px';
}