Opera handles jQuery's animation method in a very strange way

I have a drop down menu. Its height is animated with jQuery from 5px to 130px and vice versa.

The menu worked fine when it was separated by an element (when I developed it), but when other elements appeared Opera made a surprise:

alt text http://img12.imageshack.us/img12/9366/menusy.png

I marked the first state as 1 and the second as 2. The third state should be the same as the first, but, as you can see, it has a tail.

UPD: source code

HTML:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 

"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <script type="text/javascript" src="js/jquery.js">
    </script>
    <script type="text/javascript" src="js/script.js">
    </script>
    <script type="text/javascript">
      $(function(){
        init();
      });
    </script>
    <link rel="stylesheet" href="css/styles.css"/>
</head>
<body>
  <div id="side" class="side_outer"> 
        <div class="cn tr"> </div>
        <div class="cn tl"> </div>

        <div class="auth">
          <span class="auth_entr">Click me</span> 
          <div class="auth_fields"> 

          </div>
          <div id="auth_separator"> </div>
        </div>
        <div class="side_inner">
            <div class="cn tr"> </div>
            <div class="cn tl"> </div>
                <div class="side_content">
                    Some content
                </div>   
            <div class="cn br"> </div>
            <div class="cn bl"> </div>
        </div>
        <div class="cn br"> </div>
        <div class="cn bl"> </div>  
  </div>
  <div id="header"> Header</div>
  <div id="central"> Center</div>
</body>
</html>

CSS

#header {
  background: red;
  height: 100px;
  margin: 30px 330px 20px 20px;

}

#central {
  background: green;
  height: 150px;
  margin: 20px 330px 20px 20px;
}

#side {
  margin-right: 3%;
  margin-left: 10px;
  margin-top: 30px;
  min-width: 200px;
  float: right;
}

.side_outer {
  padding: 0 10px;
  background: #f2f2cc;
  width: 22%;
  border-bottom-style: dashed;
  border-bottom-width: 2px;
  border-bottom-color: black;
}

.side_inner {
    position:relative;
    overflow:hidden;
    padding: 0 10px;
    background: #accbfa;  
}

.side_outer .cn {
  position: relative;
  width: 20px;
  height: 20px;
}

.side_outer .cn.tr, .side_outer .cn.br {
  float: right;
  left: 10px;
}

.side_outer .cn.tl, .side_outer .cn.bl {
  left: -10px;
}

.auth {
  overflow: hidden;
}

.auth_entr {
  position: relative;
  top: 5px;
  margin-left: 17px;
  padding:  0 5px;
  color:  #1e5ebe;
  cursor: pointer;
}

.auth_fields {
  overflow: hidden;
  height: 5px;
  margin-top: 5px;
}


#auth_separator {
  height: 6px;
  font-size: 2px;
}

.side_content {
  height: 100px;
  padding: 5px 15px;
}

JavaScript:

var auth_state = 1;

function init () {
  $('span.auth_entr').click (function (){
     auth_state = (auth_state + 1) % 2;
     if (auth_state == 1) {
          $('div.auth_fields').animate({height: '5px'},  1000);
     } else {
          $('div.auth_fields').animate({height: '132px'}, 1000);
     }
  });
}

Actually, I solved the problem using some street magic (I added a thick white border at the bottom of the menu, and now the "fairy tale" is transparent). But I'm curious what the problem is, and is there a normal solution?

P.S. div . Opera - 9,5 ( , , - ).

P.P.S. Opera 9.6, .

+3
2

IE 7, 8 FF3, . , , Opera. Opera 9.64 , .

Google Opera . , , : jquery-smooth-scroll-bugs.

, , Opera.

+5

div <div class="cn bl"> , , 50px ( - ), - , ( -50px).

0

Source: https://habr.com/ru/post/1708044/


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