<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>下拉列表</title>
<style type="text/css">
.now{ color:red;}
.ullishes{ width:100px; overflow:hidden;}
</style>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
$(function(){
$('div.aa').data('key',0);
$('ul.ullishes li').hover(function(){
$('ul.ullishes li').removeClass('now');
var index=$(this).index();
$(this).addClass('now');
$('div.aa').data('key',index);
console.log($('div.aa').data('key'));
},function(){
$(this).removeClass('now');
});
$('.inp_match').keydown(function(event){
$('ul.ullishes li').removeClass('now');
var keycode = event.which;
if(keycode == 38){
var i = $('div.aa').data('key');
if(i<0){
i=3;
}else{
i--;
}
$('ul.ullishes').find('li').eq(i).addClass('now');
$('div.aa').data('key',i);
}
if(keycode == 40){
var i = $('div.aa').data('key');
if(i>3){
i=0;
}else{
i++;
}
$('ul.ullishes').find('li').eq(i).addClass('now');
$('div.aa').data('key',i);
}
})
})
</script>
</head>
<body>
<div class="aa"><input type="text" class="inp_match" /></div>
<ul class="ullishes">
<li></li>
<li>1111</li>
<li>2222</li>
<li>3333</li>
<li>4444</li>
</ul>
</body>
</html>
