如何使用键盘通过< ul> < li>元件
问题描述:
可能重复:
KeyBoard使用jquery导航菜单
使用< ul> < li>
标签,并在用户在文本框中按输入
键时向用户显示。他可以使用鼠标选择菜单中的项目(在菜单中导航),但是我也想允许他使用例如键盘的向上/向下按钮从该菜单中选择项目。
I created a menu using <ul> <li>
tags and showing it to the user when he presses Enter
key in the textbox. He can select items of the menu (navigate in menu) using mouse but I want also to allow him to select items from that menu using up/dow buttons of the keyboard for example.
这是使用jQuery或CSS的任何方式吗?
Is it any way to do that using jQuery or CSS?
我的菜单有以下结构: p>
My menu has following structure:
<div class="services">
<div class="items">
<ul>
<li class="mail-icon"><a href="#" id="mail"><?php echo $langmsg['mail']; ?></a></li>
<li class="forum-icon"><a href="#" id="forum"><?php echo $langmsg['forum']; ?></a></li>
<li class="chat-icon"><a href="#" id="chat"><?php echo $langmsg['chat']; ?></a></li>
</ul>
</div>
</div>
注意:< li>
一个背景图片。
答
以下是如何处理循环选择:
Here is how to handle circular selection:
if (e.keyCode == 38) { // up
var selected = $(".selected");
$(".services li").removeClass("selected");
// if there is no element before the selected one, we select the last one
if (selected.prev().length == 0) {
selected.siblings().last().addClass("selected");
} else { // otherwise we just select the next one
selected.prev().addClass("selected");
}
}
css:
.services li.selected {
background-color: grey;
}