XML : Cannot delete XML RSS Nodes with Date Parameters using JQuery

I don't know why I cannot remove any XML nodes at all.

I am running a javascript/jquery script using date parameters to delete old content from the rss feed created using xml. The moCheck function is as follows:

  //monthly check of posts  function moCheck(){  //date parameters  var xml = xmlDoc.getElementsByTagName("pubDate")[0].childNodes[0].nodeValue;  var date = new Date();  var runOn = new Date(date.setDate(1));//set date to do the search for expired posts - 14th of every month - subject to change to 1st  var expire = new Date(date.getTime() - (90 * 24 * 60 * 60 * 1000));//expires in 90 days (90 * 24 * 60 * 60 * 1000)  var pubDates = new Date(xml);//dates for xml pubDate tag  var months = Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");//month format = pubDate month format  var string = pubDates.getDate() + " " + months[pubDates.getMonth()] + " " + pubDates.getFullYear();//the date format currently displayed in rss  var removeItem = $("item", xmlDoc).remove();  if(pubDates > expire){  $('string').removeItem;  alert("On " + runOn + ", expired date = " + expire + ", the amt of items to be deleted are: " + string.length);  }  }  window.onload = moCheck;    

I tried using a backwards loop + splice, .remove(), removeChild, parentNode.removeChild, .empty, etc, etc, but nothing is being removed. I wanna know how can I make the nodes that have the date parameters above stop displaying on my html template. Please help...