function is_msie() {
	agent = navigator.userAgent;
	return navigator.userAgent.toLowerCase().indexOf("msie") != -1; 
}

function msie_replace_png_imgs() {
	if (!is_msie()) return;
	if (is_msie() && navigator.userAgent.toLowerCase().indexOf("msie 7.0") != -1) return;
	if (agent.toLowerCase().indexOf('mac')>-1) return;
	var i, elements;

	elements = document.getElementsByTagName("img");
	for (i = 0; i < elements.length; i++) {
		var img = elements[i];
		if (img.src.toLowerCase().search(/\.png$/) < 0) continue;

		img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + img.src  + "', sizingMethod='image')";
		img.src = "/data/clear.gif";

	}
}

function init() {
	msie_replace_png_imgs();
}