Slide Toggle Tab - LTR

HTML

<div class="wrapper">
    <div id="panel"> Me</div><!-- #panel -->
    <p>content</p>
</div><!-- .wrapper -->

CSS

body {margin:0;padding:0}
.wrapper {position:absolute;left:-200px;width:300px;height:400px;}
#panel {background:red;position:absolute;right:0;top:30px;width:25px;height:25px;cursor:pointer}
.wrapper > p {background:#000;color:#fff;width:200px;height:400px;}

JavaScript

var isOpen = false;
$('#panel').click(function() {
    if (isOpen) {
        $(this).parent().stop(true, true).animate({left: '-200'}, 'fast');
    } else {
        $(this).parent().stop(true, true).animate({left: '0'}, 'fast');
    }
    isOpen = !isOpen;
});