if (typeof IEPNG == 'undefined') {
//--============================================================================

var IEPNG = {

	replace: function(elem) {
		if (!/MSIE (5\.5|6\.)/.test(navigator.userAgent)) return;

		var elmStyle = elem.currentStyle || elem.style;
		var bgImg    = elmStyle.backgroundImage;
		
		if (elem.tagName == 'IMG') {

			if ((/(.+)\.png$/i).test(elem.src)) {
			alert(RegExp.$1 + ".gif");
				elem.src = elem.src.replace(/\.png$/i,".gif");
			}
		}
		else if (bgImg && bgImg != 'none') {
		
			if (bgImg.match(/^url[("']+(.*\.png)[)"']+$/i)) {
				var s = RegExp.$1;
				elem.style.backgroundImage = "url('" + s.replace(/\.png$/i,".gif") + "')";
			}
		
		}
	}

};

}