Hide Certain Users Comments GreaterFool

greaterfool.user.js

// ==UserScript==
// @name          Hiding Mark's Comments and any other user on http://www.greaterfool.ca
// @namespace     http://www.greaterfool.ca
// @description   Greasemonkey script that hides any user named Mark/mark/MARK/mArK etc comments and anyone else, just add their name to the users array
// @include       *
// @grant         none
// @author        Fortune Faded
// ==/UserScript==

var users = ["Mark", "SMOKING man"];
var usersLC= users.join('|').toLowerCase().trim().split('|');

var dl = document.getElementById("comment_list");
var dt = dl.getElementsByTagName("dt");
var dd = dl.getElementsByTagName("dd");

var commentID, userName, userInfo, subNodes, myName;

for (i=0; i<dt.length; i++)
{
  commentID = dt[i].getAttribute("id");
  
  if (commentID.substring(0,7) == 'comment')
    {
      userInfo = dt[i].getElementsByTagName("Strong")[0];
      userName = userInfo.innerHTML;  
      subNodes = userInfo.childNodes;
      
      if(subNodes.length > 1)
      {
         for (x=0; x<subNodes.length;x++)
            {               
              myName = subNodes[x].innerHTML;
              
              if(typeof myName != 'undefined')
                {
                    if(usersLC.indexOf(myName.toLowerCase().trim()) != -1 )
                      {
                        dd[i].style.visibility = 'hidden';
                        break;
                      }
                } 
            }
      }
      else if(usersLC.indexOf(userName.toLowerCase().trim()) != -1 )
          {          
            dd[i].style.visibility = 'hidden';
          }
    }
}