function fancyRules() { 
  if (!document.getElementsByTagName) return; 
	  var hr = document.getElementsByTagName("hr");
  for (var i=0; i<hr.length; i++) { 
    var newhr = hr[i]; 
    var wrapdiv = document.createElement('div');
    wrapdiv.className = 'line';  
    newhr.parentNode.replaceChild(wrapdiv, newhr);  
    wrapdiv.appendChild(newhr);  
  } 
 } 

window.onload = fancyRules;

//function to replace target="_blank" which is not xhtml valid
//example <a href="" rel="external"></a>
function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target="_blank";
 }
}
window.onload = externalLinks;