if (document.all && /MSIE (5\.5|6)/.test(navigator.userAgent) &&
  document.styleSheets && document.styleSheets[0] && document.styleSheets[0].addRule)
 {
 
 document.styleSheets[0].addRule('*', 'behavior: url(public/iepngfix.htc)');
  // Feel free to add rules for specific elements only, as above.
  // You have to call this once for each selector, like so:
 document.styleSheets[0].addRule('img', 'behavior: url(public/iepngfix.htc)');
 document.styleSheets[0].addRule('div', 'behavior: url(public/iepngfix.htc)');
 } 
 

function rollOver(imagename, filename) {
	window.document[imagename].src=filename;
}