var isIE = (new String(navigator.appName)).match(/Microsoft/);

function writeNavEntry(imageNormal, imageOver, href, imgName, blankImage, width, height) {
	if (isIE) {
		document.write("<div style=\"width:"+width+"px;height:"+height+"px;\">");
		document.write("<a href=\""+href+"\" onMouseOver=\"toggleAlphaImageIE('"+imgName+"','"+imageOver+"');\" onMouseOut=\"toggleAlphaImageIE('"+imgName+"','"+imageNormal+"');\">");
		document.write("<img id=\""+imgName+"\" name=\""+imgName+"\" src=\""+blankImage+"\" width=\""+width+"\" height=\""+height+"\" border=\"0\" style=\"filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+imageNormal+"', sizingMethod='scale');\"></a>");
		document.write("</div>");
		
	} else {
		document.write("<div style=\"width:"+width+"px;height:"+height+"px;\">");
		document.write("<a href=\""+href+"\" onMouseOver=\"toggleAlphaImage('"+imgName+"','"+imageOver+"');\" onMouseOut=\"toggleAlphaImage('"+imgName+"','"+imageNormal+"');\">");
		document.write("<img id=\""+imgName+"\" name=\""+imgName+"\" src=\""+imageNormal+"\" width=\""+width+"\" height=\""+height+"\" border=\"0\"></a>");
		document.write("</div>");
		
	}
}

function toggleAlphaImageIE(imgName, img) {
	var obj = document.getElementById(imgName);
	var before = obj.style.filter;
	obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+img+"', sizingMethod='scale')";
}

function toggleAlphaImage(imgName, img) {
	document.images[imgName].src = img;
}