From my understanding, you would require something similar to the following: http://jsfiddle.net/steweb/pvdXa/
I quickly put together this mock-up.
Here is the markup:
<div id="handler"></div> <!-- This is your 'tab' that can be dragged -->
<div id="toSlide">Content that will be revealed</div> <!-- This content will slide in and out -->
JavaScript code:
var toSlide = document.id('toSlide'); // Get the content div
document.id('handler').makeDraggable({
limit:{x:[10,10],y:[10]}, // Set limits for dragging
onDrag:function(elem){ // While user drags, adjust the content height
toSlide.setStyle('height',elem.offsetTop-10);
}
});
I hope this information is helpful :)