javascript - how to make dropdown menu using html & css -


i'm trying create html menu holding login form, when expand menu, login form appears, problem when click on form write username or password, menu collapses automatically , login form disappears before write inside it

here image of menu , form in it. 

<body>   <div class="wrapper-demo">     <div id="dd" class="wrapper-dropdown-3" tabindex="1">          <span>login</span>       <ul class="dropdown">         <li>           username<input type="text" id="un"><br/>           password<input type="text" id="pass"><br/>           <input type="submit" id="login" value="login">         </li>       </ul>     </div>​</div>   </div>   <!-- jquery if needed -->   <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>   <script type="text/javascript">     function wtf() {       window.location.href = "";     }     function dropdown(el) {       this.dd = el;       this.placeholder = this.dd.children('span');       this.opts = this.dd.find('ul.dropdown > li');       this.val = '';       this.index = -1;       this.initevents();     }     dropdown.prototype = {       initevents: function () {         var obj = this;         obj.dd.on('click', function (event) {           $(this).toggleclass('active');           return false;         });       }     }     $(function () {       var dd = new dropdown($('#dd'));       $(document).click(function () {         // dropdowns         $('.wrapper-dropdown-3').removeclass('active');       });     });   </script> </body>

issue have click event on wrapper on document click on input fields or surrounding area executes click on wrapper , toggles state according logic. click on elements inside bubbles parent , toggles state, why collapses when click on input field or other fields inside dropdown. 1 quick way identify place event coming , if dropdown triggers handle else leave it.

fiddle

html mark change:- added class called dd both identify place of actual trigger.

<div id="dd" class="wrapper-dropdown-3 dd" tabindex="1">      <span class="dd">login</span>

script

dropdown.prototype = {       initevents: function () {           var obj = this;           obj.dd.on('click', function (event) {               event.stoppropagation(); //stop propagation               if (event.target.classname === 'dd') { //check specfic targets                   $(this).toggleclass('active');                }               return false;            });       }   }

if change html structure move .dropdown out of same wrapper trigger issue won't happen.


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