HEADER 1/2 - SWITCHING

by bizamajig

HTML

<div id="header-wrap">
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
    Your menu<br/>
    Link1 Link2 Link3
</div>
<div id="header-2">
    hwere@@@@
</div>
<div id="container">
   A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
     A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
  A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/>
    A lot of TEXT !!!<br/> 
    A lot of TEXT !!!<br/>
</div>

CSS

#header-wrap {
    background: #eeeeff;
    width: 100%;
    height: 50px;
    top: 0;
    position:relative;
}
#header-2{
    background: #eeeeff;
    width: 100%;
    height: 50px;
}
#container{ 
    margin-top: 50px;
}
.posi{
    position:fixed;
     margin-top: 0;
    top:0;
}

JavaScript

$(window).scroll(function () {
    if( $(window).scrollTop() > $('#header-2').offset().top && !($('#header-2').hasClass('posi'))){
    $('#header-2').addClass('posi');
    } else if ($(window).scrollTop() == 0){
    $('#header-2').removeClass('posi');
    }
});