dom 筛选器

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<title>无标题文档</title>

<style>

dd {

        cursor: pointer;

    }

</style>

<script type="text/javascript">

window.onload = function ()

{

    var odl = document.getElementsByTagName('dl');

    var odiv = document.getElementById('div1');

    var location = '';

    var position = '';

    var salary = '';

    for(var i = 0; i < odl.length; i++)

    {

        fn(i);

    }

    function fn(n)

    {

        var odd = odl[n].getElementsByTagName('dd');

        for(var i = 0; i < odd.length; i++ )

        {

            odd[i].onclick = function ()

            {

                switch(n)

                {

                    case 0:

                    location = this.innerHTML + ' ';

                    break;

                    case 1:

                    position = this.innerHTML + ' ';

                    break;

                    case 2:

                    salary = this.innerHTML + ' ';

                    break;

                }

                odiv.innerHTML  = location + position + salary;

            };

        }

    }

}

</script>

</head>

<body>

    <dl>

        <dt>地区</dt>

        <dd>东城</dd>

        <dd>西城</dd>

        <dd>朝阳</dd>

        <dd>昌平</dd>

    </dl>

    <dl>

        <dt>职位</dt>

        <dd>美工设计</dd>

        <dd>前端工程师</dd>

        <dd>后台开发</dd>

    </dl>

    <dl>

        <dt>薪资</dt>

        <dd>4000</dd>

        <dd>5000</dd>

        <dd>6000</dd>

    </dl>

    <div id="div1"></div>

</body>

</html>
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