xpathselector.js

function $x(xpath, root) {
       root = root ? root : document;
       try {
               var nodes = document.evaluate(xpath, root, null, 7, null);
       } catch(e) {
               return [];
       }
       var result = [];
       for(var i = 0; i < nodes.snapshotLength; i++) {
               result[i] = nodes.snapshotItem(i);
       }
       return result;
}