rssCode.js

function myGetElementsByClassName(selector) {
  if ( document.getElementsByClassName ) {
    return document.getElementsByClassName(selector);
  }
  var returnList = new Array();
  var nodes = document.getElementsByTagName('div');
  var max = nodes.length;
  for ( var i = 0; i < max; i++ ) {
    if ( nodes[i].className == selector ) {
      returnList[returnList.length] = nodes[i];
    }
  }
  return returnList;
}

var rssReader = {
  containers : null,
  // initialization function
  init : function(selector) {
    containers = myGetElementsByClassName(selector);
    for(i=0;i<containers.length;i++){
      // getting necessary variables
      var rssUrl = containers[i].getAttribute('rss_url');
      var num = containers[i].getAttribute('rss_num');
      var id = containers[i].getAttribute('id');
      // creating temp scripts which will help us to transform XML (RSS) to JSON
      var url = encodeURIComponent(rssUrl);
      var googUrl = 'https://ajax.googleapis.com/ajax/services/feed/load?v=1.0&num='+num+'&q='+url+'&callback=rssReader.parse&context='+id;
      var script = document.createElement('script');
      script.setAttribute('type','text/javascript');
      script.setAttribute('charset','utf-8');
      script.setAttribute('src',googUrl);
      containers[i].appendChild(script);
    }
  },
  // parsing of results by google
  parse : function(context, data) {
    var container = document.getElementById(context);
    container.innerHTML = '';
    // creating list of elements
    var mainList = document.createElement('ul');
    // also creating its childs (subitems)
    var entries = data.feed.entries;
    for (var i=0; i<entries.length; i++) {
      var listItem = document.createElement('li');
      var title = entries[i].title;
      var contentSnippet = entries[i].contentSnippet;
      var contentSnippetText = document.createTextNode(contentSnippet);
      var link = document.createElement('a');
      link.setAttribute('href', entries[i].link);
      link.setAttribute('target','_blank');
      var text = document.createTextNode(title);
      link.appendChild(text);
      // add link to list item
      listItem.appendChild(link);
      var desc = document.createElement('p');
      desc.appendChild(contentSnippetText);
      // add description to list item
      listItem.appendChild(desc);
      // adding list item to main list
      mainList.appendChild(listItem);
    }
    container.appendChild(mainList);
  }
};
window.onload = function() {
  rssReader.init('post_results');
}