function correctPNG() {
	// somente executa essa função se o navegador for Internet Explorer versão < 7.0
	var userAgent = navigator.userAgent.toLowerCase();
	var msie = userAgent.indexOf("msie");
	executa = false;
	if (msie > 0) {
		var msieversion = userAgent.substr(msie+5,3);
		if (msieversion<7) executa=true;
	}
	
if (executa) {
   for(var i=0; i<document.images.length; i++)
      {
      var img = document.images[i]
      var imgName = img.src.toUpperCase()
      if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
         var imgID = (img.id) ? "id='" + img.id + "' " : ""
         var imgIDName = (img.name) ? "name='" + img.name + "' " : ""
         var imgClass = (img.className) ? "class='" + img.className + "' " : ""
         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "

		 verifica = img.style.cssText.toLowerCase();
		 verifica = verifica.indexOf("filter");
		 complemento='';
		 if (verifica>= 0) complemento = ";"+img.style.cssText.substr(7);
         var imgStyle = "display:inline-block;" // + img.style.cssText
         if (img.align == "left") imgStyle = "float:left;" + imgStyle
         if (img.align == "right") imgStyle = "float:right;" + imgStyle
         if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
         var strNewHTML = "<span "+ imgID + imgClass + imgTitle
         + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
         + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
         + "(src=\'" + img.src + "\', sizingMethod='scale'";
		 
		 strNewHTML = strNewHTML + ");\"></span>"
         img.outerHTML = strNewHTML
         i = i-1
         }
      }
   }
}
var userAgent = navigator.userAgent.toLowerCase();
var msie = userAgent.indexOf("msie");
var msieversion = userAgent.substr(msie+5,3);
if (msie && msieversion<7) window.attachEvent("onload", correctPNG);