/* Ritorna la classe corretta da associare all'immagine in base delle sue dimensioni. */
function getClassByImageDimension(image) {
	var newImg = new Image();
	newImg.src = image.src;
	var height = newImg.height;
	var width = newImg.width;
	return "shadow" + width + "x" + height;
}

function setUpShadows() {
	
	var image;
	
	for (i=0; i<document.getElementsByTagName('*').length; i++){ 
		
		image = document.getElementsByTagName('*')[i];
		
		if(image.className == "shadow") {
			image.className = getClassByImageDimension(image);
		}

		if(image.className == "zoom_shadow") {
			image.className = "zoom_" + getClassByImageDimension(image);
		}
	}

}

var fun = setUpShadows;
if (window.addEventListener) window.addEventListener('load', fun, false); 
else if (window.attachEvent) window.attachEvent("onload", fun);