Eu tenho um div com uma altura e largura limitada com conteúdo que excede o tamanho do div. Por isso, coloquei duas imagens na parte superior e inferior da div e quero que o conteúdo se desloque para cima e para baixo em relação à imagem em que eu pairo. Eu consegui obter o pairando, mas ele descontrolado, vai até o fim, mesmo se eu mover o mouse para longe da imagem. Então, quero que a rolagem pare assim que eu mova o mouse e quando eu passar o mouse novamente na imagem, quero que a rolagem continue de onde parou.jsfiddle

HTML:

<div id="hover"> HOVER ME </div>

<div id="container">

The Mauritius Blue Pigeon is an extinct species of blue pigeon formerly endemic to the Mascarene island of Mauritius in the Indian Ocean east of Madagascar. It has two extinct relatives from the Mascarenes and three extant ones from other islands. It had white hackles around the head, neck and breast and blue plumage on the body, and it was red on the tail and the bare parts of the head. These colours were thought similar to those of the Dutch flag, a resemblance reflected in some of the bird's names. It was 30 cm (12 in) long and larger and more robust than any other blue pigeon species. It could raise its hackles into a ruff, which it used for display. Its call sounded like "barf barf" and it also made a cooing noise. It fed on fruits, nuts, and molluscs, and was once widespread in the forests of Mauritius. The bird was first mentioned in the 17th century and was described several times thereafter, but very few accounts describe the behaviour of living specimens. Several stuffed and at least one live specimen reached Europe in the 1700s and 1800s. Only three stuffed specimens exist today, and only one bird was ever depicted when alive. The species is thought to have become extinct in the 1830s due to deforestation and predation. (Full article...)
Recently featured: Action of 1 January 1800 – Terang Boelan – Muckaty Station............................................................................................................................................................................

The Mauritius Blue Pigeon is an extinct species of blue pigeon formerly endemic to the Mascarene island of Mauritius in the Indian Ocean east of Madagascar. It has two extinct relatives from the Mascarenes and three extant ones from other islands. It had white hackles around the head, neck and breast and blue plumage on the body, and it was red on the tail and the bare parts of the head. These colours were thought similar to those of the Dutch flag, a resemblance reflected in some of the bird's names. It was 30 cm (12 in) long and larger and more robust than any other blue pigeon species. It could raise its hackles into a ruff, which it used for display. Its call sounded like "barf barf" and it also made a cooing noise. It fed on fruits, nuts, and molluscs, and was once widespread in the forests of Mauritius. The bird was first mentioned in the 17th century and was described several times thereafter, but very few accounts describe the behaviour of living specimens. Several stuffed and at least one live specimen reached Europe in the 1700s and 1800s. Only three stuffed specimens exist today, and only one bird was ever depicted when alive. The species is thought to have become extinct in the 1830s due to deforestation and predation. (Full article...)
Recently featured: Action of 1 January 1800 – Terang Boelan – Muckaty Station............................................................................................................................................................................
</div>
<div id="hover2"> HOVER ME </div>​

CSS:

#hover{
   width:200px;
   height:20px;
 border:1px solid #cc0000;   
}
#hover2{
   width:200px;
   height:20px;
 border:1px solid #cc0000;   
}
#container{
  width:500px;
  height:300px;
 overflow-y:auto;   
    border:1px solid #000;
    overflow: hidden;
}
#container div{
  width:100px;
height:100px;    
    float:left;
}​

JAVASCRIPT:

$('#hover').hover(function(){
    $('#container').animate({ scrollTop: $('#container')[0].scrollHeight }, 1000);
});
$('#hover2').hover(function(){
    $('#container').animate({ scrollTop: 0 }, 1000);
});     

​