javascript - 在 div 文本上垂直滚动

Question

目前我的 div 使用两个按钮(向上和向下)滚动，但我希望它跳到顶部并跳到底部，这两个按钮具有垂直自动滚动(向下)。我如何在 jQuery 中完成此操作？到目前为止，这是我的代码:http://jsfiddle.net/NkY8J/ .

HTML

    <div id="scroll">
         Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here<br /><br />
    Content here and more content here
      </div>
              <input id="scroll-up" class="btn" type="button" value="Up"/>
              <input id="scroll-down" class="btn" type="button" value="Down"/>
​

JS

$(function() {
    var ele   = $('#scroll');
    var speed = 25, scroll = 5, scrolling;

    $('#scroll-up').mouseenter(function() {
        // Scroll the element up
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() - scroll );
        }, speed);
    });

    $('#scroll-down').mouseenter(function() {
        // Scroll the element down
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() + scroll );
        }, speed);
    });

    $('#scroll-up, #scroll-down').bind({
        click: function(e) {
            // Prevent the default click action
            e.preventDefault();
        },
        mouseleave: function() {
            if (scrolling) {
                window.clearInterval(scrolling);
                scrolling = false;
            }
        }
    });
});
​

CSS

#scroll {
    width: 200px;
    height: 100px;
    overflow: hidden;
    padding: 4px;
}​

Answer 1

让我们看看这里。 http://jsfiddle.net/NkY8J/2/

只需设置 ele.scrollTop(0); 即可跳转到顶部。

并设置 ele.scrollTop(Math.pow(10,9)); 跳到底部。