function modifyExternalLinks()
{
	var anchors = document.getElementsByTagName("a");
	for (var j = 0;j < anchors.length;j++)
	{
		if (anchors[j].className == "external")
		{
			var img = document.createElement("img");
			img.className = "external";
			img.alt = "link esterno";
			
			anchors[j].appendChild(img);
		}
	}
}