var isIE = /MSIE/.test(navigator.userAgent) && navigator.platform == "Win32";
var blankImage = "./blank.gif";

function imageReplace(targetId, targetImage) {
	var t = document.getElementById(targetId);
	var txt = t.innerHTML;
	t.innerHTML = '';
	var el = document.createElement('img');
	el.src = targetImage;
	el.alt = txt;
	t.appendChild(el);

	if(isIE) {
		if ( /\.png$/.test( targetImage.toLowerCase() ) ) {
		  el.src = blankImage;
		  el.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled='true', src='" + targetImage + "',sizingMethod='scale')";
		}
		else {
		  el.style.filter = "";
		}
	}	
}

function bgPNGFix(targetId) {
	if(isIE) { 
		var obj = document.getElementById(targetId); 
		var bgImage = obj.currentStyle.backgroundImage;
	 	var src = bgImage.substring(5,bgImage.length-2);
	 	obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "')";
		obj.style.backgroundImage = "url(" + blankImage + ")";
	}
}