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;