var xhtml = "http://www.w3.org/1999/xhtml";
var allItems = document.getElementsByTagName("item");
for (var i=0;i<allItems.length;i++)
{
    var itemElm = allItems[i];
    var titleElm = itemElm.getElementsByTagName("title").item(0);
    var titleText = titleElm.firstChild.nodeValue;
    var linkElm = itemElm.getElementsByTagName("link").item(0);
    var linkURL = linkElm.firstChild.nodeValue;

    var newLinkElm = document.createElementNS(xhtml,"a");
    var txtNode = document.createTextNode(titleText);
    newLinkElm.setAttributeNS(xhtml,"href",linkURL);
    newLinkElm.appendChild(txtNode);
    newLinkElm.style.display = "block";
    itemElm.replaceChild(newLinkElm,titleElm);
}