dom select选单

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
body { margin: 0; padding: 0; }
ul { padding: 0; margin: 0; }
li { list-style: none; }
a { text-decoration: none; color: #000; display: block; }
#div1 { width: 250px; height: 20px; border: 1px solid #fe6601; padding: 5px; line-height:20px; margin: 20px auto 0 auto;}
#ul1 { margin: 0 auto; width: 260px; line-height: 20px; border: 1px solid #fe6601; display: none;}
#ul1 li a { padding: 5px; }
#ul1 li a:hover { background: #fe6601; color: #fff; }
</style>
<script type="text/javascript">
window.onload = function ()
{
    var odiv = document.getElementById('div1');
    var oul = document.getElementById('ul1');
    var arr = [];

    odiv.onclick = function (ev)
    {
        var ev = ev || event;
        oul.style.display = 'block';
        ev.cancelBubble = true;
    }

    for(var i = 0; i < oul.children.length; i++ )
    {
        oul.children[i].onclick = function ()
        {
            for(var i = 0; i < oul.children.length; i++ )
            {
                oul.children[i].children[0].style.background = '';
                oul.children[i].children[0].style.color = '';
            }
            odiv.innerHTML = this.children[0].innerHTML;
            this.children[0].style.background = '#fe6601';
            this.children[0].style.color = '#fff';
        }
    }

    document.onclick = function ()
    {
        oul.style.display = 'none';
        arr = [];
    }

};
</script>
</head>

<body>
    <div id="div1"></div>
    <ul id="ul1">
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        <li><a href="javascript:;">新宋体</a></li>
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    </ul>
</body>
</html>