//var cssURL = '/css/fonts_default.css';

function changeCSS() {
  var cssURL = document.getElementById('fonts').href;
  cssURL = cssURL.substring( cssURL.indexOf("/css") );

  if ( cssURL == '/css/fonts_default.css' ) {
    cssURL = '/css/fonts_large.css';
  }
  else if ( cssURL == '/css/fonts_large.css' ) {
    cssURL = '/css/fonts_small.css';
  }
  else {
    cssURL = '/css/fonts_default.css';
  }
  
  document.getElementById('fonts').href = cssURL;
  setCSSFile(cssURL);
}

function setCSSFile(cssURL) {
  if ( ! isWorking )
  {
    var url = ajaxURL +"css="+ cssURL;
    httpRequest( "get", url, true, setCSSFile_cb );
  }
}


function setCSSFile_cb() {
  isWorking = false;
}