Question

在四舍五入的四舍五入位数中,每四舍五入到哪一类员额的最佳方式是什么?

<div class="34 post">
<img width="311" height="417" src="#" class="#" alt="newspapers" />
<h2><a href="#">Headline News Part 2</a></h2>
<p>testing new content</p>
</div>

<div class="9 post">
<img width="311" height="417" src="#" class="#" alt="newspapers" />
<h2><a href="#">Headline News Part 2</a></h2>
<p>testing new content</p>
</div>

<div class="6 post">
<img width="311" height="417" src="#" class="#" alt="newspapers" />
<h2><a href="#">Headline News Part 2</a></h2>
<p>testing new content</p>
</div>

so i want the first to have a class of "display" then after 4 seconds, i want to remove the class on that one and add it to the second one. and then after 4 more seconds, remove it from the second and add it to the third. when it gets to the end it loops back around.

Answer 1

var $postDivs = $( div.post ), // assuming these won t change
    i = -1,
    CLASS_NAME =  foo ;

setInterval(function () {
    $postDivs.eq(i).removeClass(CLASS_NAME);
    i = (i+1) % $postDivs.length;
    $postDivs.eq(i).addClass(CLASS_NAME);
}, 4000);

http://jsfiddle.net/mattball/k2sJy/

Answer 2

如果你想对新闻物品进行简单而明确的轮换,你可尝试。页: 1 彩虹/a”

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