var ua = navigator.userAgent.toLowerCase();
var esOpera = (ua.indexOf('opera') != -1);
var esIE = (ua.indexOf('msie') != -1 && !esOpera && (ua.indexOf('webtv') == -1) );
var version = parseFloat(navigator.appVersion); 
versionfinal = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );

var esIE55 = (esIE && versionfinal >= 5.5);

if (esIE55 && versionfinal){
function correctPNG() 
   {
   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")
	     {
		 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 strNewHTML = "<span " + imgID + imgClass + imgTitle
		 + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
	     + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
		 + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
		 img.outerHTML = strNewHTML
		 i = i-1
	     }
      }
   }
window.attachEvent("onload", correctPNG);
}
//alert('EsIE '+ esIE + esOpera + version + ua);

<!--
function getBlank (form, stdValue){
if (form.value == stdValue){
	form.value = '';
	}
return true;
}
//-->

var DOMsupport = document.getElementById && document.getElementsByTagName && document.createElement;

function applyShadow(targetElement, shadowColor, shadowOffset) {
  if (typeof(targetElement) != 'object') {
    targetElement = document.getElementById(targetElement);
  }
  var value = targetElement.firstChild.nodeValue;
  targetElement.style.position = 'relative';
  targetElement.style.zIndex = 1;
    
  var newEl = document.createElement('span');
  newEl.appendChild(document.createTextNode(value));
  newEl.className = 'shadowed';
  newEl.style.color = shadowColor;
  newEl.style.position = 'absolute';
  newEl.style.left = shadowOffset + 'px';
  newEl.style.top = shadowOffset + 'px';
  newEl.style.zIndex = -1;
  
  targetElement.appendChild(newEl);
}

if (DOMsupport) {
  window.onload = function() {
    applyShadow('heading', '#ccc', 2);
    applyShadow('anch', '#99f', 2);
    applyShadow('lipsum', '#c66', 1);
    for (var i = 0; i < document.getElementById('list').getElementsByTagName('li').length; i++) {
      applyShadow(document.getElementById('list').getElementsByTagName('li')[i], '#aaa', 1);
    }
  }
}