Count the No of tag in a html body

by sum1

HTML

<body>
    <div class="container main-container">

        <div class="navbar navbar-default navbar-fixed-top">
          <div class="container">
            <div class="navbar-header">
              <a href="/" class="navbar-brand">Task Engine</a>
              <button class="navbar-toggle" type="button" data-toggle="collapse" data-target="#navbar-main">
              </button>
            </div>
            <div class="navbar-collapse collapse" id="navbar-main">
              <ul class="nav navbar-nav">

                <li class="dropdown">
                  <a href="/users">Users</span></a>
                </li>
                <li class="dropdown">
                  <a href="/stats">Statistics</span></a>
                </li>




                  <li>
                  <a href="/audit_task">Audit Tasks</a>
                </li>



                  <li>
                  <a href="/groups">Groups</a>
                </li>


              </ul>

              <ul class="nav navbar-nav navbar-right">
                <li><a href="#" id="loginName"> Hi Rajesh Dhoble</a></li>
                <li><a href="/logout">Logout</a></li>
              </ul>
            </div>
          </div>
        </div>

      <div class="row">
         <div class="col-lg-6 col-sm-offset-3">
           <div class="alert alert-dismissible alert-success">
             <button type="button" class="close" data-dismiss="alert">&times;</button>
             <strong id="task-upload-count"></strong> tasks has been uploaded successfully.
           </div>
         </div>
       </div>
       <div class="overlay">
         <img src="/img/ajax-loader.gif" alt="Smiley face" height="42" width="42" class="spinner">
       </div>


        <form class="form-horizontal" id="searchTask" action="/audit_task" method="post">
        <fieldset>

         <input type="hidden" id="user_role" name="user_role" value="Manager">
         <input type="hidden" id="user_group_id" name="user_group_id"...

JavaScript

debugger;

var tag = [];
var str = "";
var _div =  $("body").find("*");
$.each(_div,function(k,v){
  var a =  $(this).html().trim();
  var b = a.match(/<\w+/);
  if(b != null)
    var c = b[0].match(/\w+/);
  if(c != null)  
  {
    if($.inArray(c[0],tag) ==-1){
      tag.push(c[0]);
       var d = $(c[0]).length;
       str += c[0] + ":" +d + " ";
    }
  }
    
});

  
alert(str);