function correctPNG() { // correctly handle PNG transparency in Win IE 5.5 or higher.
	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" && (imgName.indexOf('_16') != -1 || imgName.indexOf('_32') != -1)) {
		if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
			var imgID = (img.id) ? "id='" + img.id + "' " : "";
			var imgClass = (img.className) ? "class='" + img.className + "' " : "";
			var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
			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 w = img.width;
			if(w == 0) {
				if(imgName.indexOf('_32') != -1) {
					w = 32;
				}
				if(imgName.indexOf('_16') != -1) {
					w = 16;
				}
			}
			var h = img.height;
			if(h == 0) {
				if(imgName.indexOf('_32') != -1) {
					h = 32;
				}
				if(imgName.indexOf('_16') != -1) {
					h = 16;
				}
			}
			var strNewHTML = "<span " + imgID + imgClass + imgTitle
				+ " style=\"" + "width:" + w + "px; height:" + h + "px;" + imgStyle + ";"
				+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
				+ "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"  
			img.outerHTML = strNewHTML;
			i = i-1;
		}
	}
}
//fait seulement en fin de mainlayout.jsp
//window.attachEvent("onload", correctPNG);