parentNode，offsetParent

元素.parentNode : 父节点只读属性当前节点的父级节点没有兼容性问题可放心使用

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<script>

window.onload = function() {

    var aA = document.getElementsByTagName('a');

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

        aA[i].onclick = function() {

            this.parentNode.style.display = 'none';

        }

    }

}

</script>

</head>

<body>

<ul id="ul1">

  <li>11111 <a href="javascript:;">隐藏</a></li>

  <li>22222 <a href="javascript:;">隐藏</a></li>

  <li>33333 <a href="javascript:;">隐藏</a></li>

  <li>44444 <a href="javascript:;">隐藏</a></li>

</ul>

</body>

</html>

元素.offsetParent : 只读属性

如果没有定位父级，默认是body

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<style>

div {padding: 40px 50px;}

#div1 {background: red;}

#div2 {background: green;}

#div3 {background: orange;}

</style>

<script>

window.onload = function() {

    var oDiv3 = document.getElementById('div3');

    alert( oDiv3.parentNode.id );//弹出div2

    alert( oDiv3.offsetParent.id );//弹出body1

}

</script>

</head>

<body id="body1">

    <div id="div1">

        <div id="div2">

            <div id="div3"></div>

        </div>

    </div>

</body>

</html>

如果有定位父级则弹出父级若定位多个父级则弹出离当前元素最近的一个有定位属性的父节点

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<style>

div {padding: 40px 50px;}

#div1 {background: red; position: relative}

#div2 {background: green;position: relative}

#div3 {background: orange;}

</style>

<script>

window.onload = function() {

    var oDiv3 = document.getElementById('div3');

    alert( oDiv3.offsetParent.id );//弹出div2

 } </script> </head> <body id="body1"> <div id="div1"> <div id="div2"> <div id="div3"></div> </div> </div> </body> </html> </html>

ie7以下，如果当前元素没有定位默认是body，如果有定位则是html

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<style>

div {padding: 40px 50px;}

#div1 {background: red; }

#div2 {background: green;}

#div3 {background: orange;position: relative}

</style>

<script>

window.onload = function() {

    var oDiv3 = document.getElementById('div3');

    //alert( oDiv3.parentNode.id );//弹出div2

    alert( oDiv3.offsetParent.tagName );//ie7弹出html IE8以上弹出body

}

</script>

</head>

<body id="body1">

    <div id="div1">

        <div id="div2">

            <div id="div3"></div>

        </div>

    </div>

</body>

</html>

</html>

ie7以下，如果当前元素的某个父级触发了layout，那么offsetParent就会被指向到这个触发了layout特性的父节点上

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>无标题文档</title>

<style>

div {padding: 40px 50px;}

#div1 {background: red; zoom: 1;}

#div2 {background: green;}

#div3 {background: orange;}

</style>

<script>

window.onload = function() {

    var oDiv3 = document.getElementById('div3');

    alert( oDiv3.offsetParent.id );//ie7以下弹出的是div1,其他的弹出是BODY1

}

</script>

</head>

<body id="body1">

    <div id="div1">

        <div id="div2">

            <div id="div3"></div>

        </div>

    </div>

</body>

</html>