if (document.all && document.styleSheets && document.styleSheets[0] &&  document.styleSheets[0].addRule)
{
  document.styleSheets[0].addRule('img', 'behavior: url(/files/system/iepngfix.htc)');
}
if (document.all && document.styleSheets && document.styleSheets[1] &&  document.styleSheets[1].addRule)
{
  document.styleSheets[1].addRule('img', 'behavior: url(/files/system/iepngfix.htc)');
}
if (document.all && document.styleSheets && document.styleSheets[2] &&  document.styleSheets[2].addRule)
{
  document.styleSheets[2].addRule('img', 'behavior: url(/files/system/iepngfix.htc)');
}