// IEPNGfix
 if (document.all && document.styleSheets && document.styleSheets[0] && document.styleSheets[0].addRule) {
  // Feel free to add rules for specific tags only, you just have to call it several times.
  document.styleSheets[0].addRule('*', 'behavior: url(/sources/iepngfix.htc)');
 }