Fixing javascript array initialization

I am trying to initialize an array with another array. The array contains options for loading an RSS feed reade开发者_运维问答r. The user clicks an option button to selection which RSS category to read. Based on the selection I initalize the feed URL and options arrays like this.

feeds = feedsnews.slice(0, feedsnews.length);
options = optionsnews.slice(0, optionsnews.length);

(The entire javascript for this is at the end of the text). Then I send these arrays to the code for loading the newsreader. This seems to initialize only the first element in the array.

What is the way to initialize the array with all the elements? Are the arrays declared in the right way for the RSS loader to get them?

Here is the code:

<script language="JavaScript">

      var feedsnews = [ {title: 'Reuters Top News', url: 'http://feeds.reuters.com/reuters/topNews' }, {title: 'Reuters International', 
url: 'http://feeds.reuters.com/reuters/worldNews' }, {title: 'Reuters US News', url: 'http://feeds.reuters.com/Reuters/domesticNews' }];
      var optionsnews = {
        stacked : true,
        horizontal : false,
        title : "News"
      }

      var feedscat = [ {title: 'Catholic News Agency', url: 'http://www.catholicnewsagency.com/rss/news.xml' }, {title: 'Zenit - English', url: 'http://feeds.feedburner.com/zenit/english' }, {title: 'Zenit - Français', url: 
'http://feeds.feedburner.com/zenit/french' }];
      var optionscat = {
        stacked : true,
        horizontal : false,
        title : "Catholic"
      }

</script>

<SCRIPT LANGUAGE="JavaScript">

var feeds=feedsnews.slice();
var options=optionsnews.slice();

function GetSelectedItem() {

   feeds=feedsnews.slice(0, feedsnews.length);
   options=optionsnews.slice(0, optionsnews.length);

   chosen = "";
   len = document.f1.r1.length;

   for (i = 0; i <len; i++) {
     if (document.f1.r1[i].checked) {
     chosen = document.f1.r1[i].value
     }
   }

   if (chosen == "") {
     alert("No Location Chosen")
   }
   else if (chosen =="News") {
     feeds = feedsnews.slice(0,feedsnews.length);
     options = optionsnews.slice(0,optionsnews.length);
   }
   else if (chosen =="Catholic") {
     feeds = feedscat.slice(0,feedscat.length);
     options = optionscat.slice(optionscat.length);
   }
   else if (chosen =="Community") {

   }
   else if (chosen =="Personal") {

   }
   else if (chosen =="Professional") {

   }
   else {
     alert(chosen);
   }

   $("#snews").load("loadnews.php");

}
</script>

HTML (for #snews div)

    <div id="snews" style="position:absolute; top:30px; right: 30px; width: 430px; height: 380px; overflow-y: auto; overflow-x: hidden; background: white;">

         <?php require("loadnews.php"); ?>

    </div> <!-- End snews -->


PHP (loadnews.php)

<!-- ++Begin Dynamic Feed Wizard Generated Code++ -->
  <!--
  // Created with a Google AJAX Search and Feed Wizard
  // http://code.google.com/apis/ajaxsearch/wizards.html
  -->

  <!--
  // The Following div element will end up holding the actual feed control.
  // You can place this anywhere on your page.
  -->
  <div id="feed-control">
    <span style="color:#676767;font-size:11px;margin:10px;padding:4px;">Loading...</span>
  </div>

  <script type="text/javascript">
    function LoadDynamicFeedControl() {

      new GFdynamicFeedControl(feeds, 'feed-control', options);
    }
    // Load the feeds API and set the onload callback.
    google.load('feeds', '1');
    google.setOnLoadCallback(LoadDynamicFeedControl);
  </script>

<!-- ++End Dynamic Feed Control Wizard Generated Code++ -->

---

var optionsnews = {
    stacked : true,
    horizontal : false,
    title : "News"
  }

// snip...

options=optionsnews.slice(0, optionsnews.length);

optionsnews is an Object, not an Array. There is no Object.slice method since objects have neither numerical indexing nor inherent ordering.

What is the point of all this .slice()ing? What are you trying to accomplish?