需要在页面中一个小的区域循环滚动展示新闻（公告、活动、图片等等），并且，鼠标悬停时停止滚动并提示，离开后，继续滚动。
效果图：
[img]http://files.jb51.net/file_images/article/201408/20140822110108.gif?201472211126[/img]
[img]http://files.jb51.net/file_images/article/201408/20140822110139.png?20147221125[/img]
上干货
html：
[url=#]
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="bbbbbbbbbbbbbbb">bbbbbbbbbbbbbbb</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="ccccccccccccccc">ccccccccccccccc</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="ddddddddddddddd">ddddddddddddddd</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="eeeeeeeeeeeeeee">eeeeeeeeeeeeeee</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="fffffffffffffff">fffffffffffffff</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="ggggggggggggggg">ggggggggggggggg</a></li>
</ul>
</div>
css：
ui,li {
list-style: none;
}
#news{
height: 75px;
overflow: hidden;
}
关键是js文件：
$(function() {
var $this = $("#news");
var scrollTimer;
$this.hover(function() {
clearInterval(scrollTimer);
}, function() {
scrollTimer = setInterval(function() {
scrollNews($this);
}, 2000);
}).trigger("mouseleave");
function scrollNews(obj) {
var $self = obj.find("ul");
var lineHeight = $self.find("li:first").height();
$self.animate({
"marginTop": -lineHeight + "px"
}, 600, function() {
$self.css({
marginTop: 0
}).find("li:first").appendTo($self);
})
}
})
主要就是对hover、setInterval、clearInterval、animate这些方法以及marginTop属性（marginLeft、top、left等等）的理解和运用，需要注意的是，如果不加.trigger("mouseleave")，在网页初始化的时候列表不会滚动，还有appendTo能直接移动元素，就这些了。
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