Javascript method to control list closing and expansion through overflow

Javascript method to control list closing and expansion through overflow_javascript skills

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Release： 2016-05-16 15:58:57

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The example in this article describes how Javascript controls the closing and expansion of lists through overflow. Share it with everyone for your reference. The specific implementation method is as follows:

<!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>通过overflow控制列表闭合展开</title>
<style type="text/css">
div dl
{
  margin:0;
  padding:0;
  font-size:14px;
}
#divMain
{
  width:500px;
  background-color:#22477A;
  margin:0 auto;
  margin-top:30px;
}
dl
{
  width:200px;
  background:#A6BCE5;
  height:14px; /*和字体大小一样高*/
  overflow:hidden; /*默认溢出隐藏*/
}
dt
{
  cursor:pointer; /*设置手型光标*/
  font-weight:bold;
  color:Green;
}
.open
{
  height:112px;
  overflow:visible;
}
.close
{
  height:14px; /*和字体大小一样高*/
  overflow:hidden;
}
</style>
<script type="text/javascript">
function DisplayList() {
  var dtNode = window.event.srcElement;
  var dlNode = dtNode.parentNode;
  var dlNodes = document.getElementsByTagName("dl");
  for (var i = 0; i < dlNodes.length; i++) {
    if (dlNodes[i] == dlNode) { //判断是否是当前点击的dl
      if (dlNodes[i].className == "open") {
        dlNodes[i].className = "close";
      }
      else {
        dlNodes[i].className = "open";
      }
    }
    else {
      dlNodes[i].className = "close";
    }
  }
}
</script>
</head>
<body>
<div id="divMain">
<dl>
  <dt onclick="DisplayList()">
    球星列表1
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
<br />
<dl>
  <dt onclick="DisplayList()">
    球星列表2
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
<br />
<dl>
  <dt onclick="DisplayList()">
    球星列表3
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
<br />
<dl>
  <dt onclick="DisplayList()">
    球星列表4
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
<br />
<dl>
  <dt onclick="DisplayList()">
    球星列表5
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
<br />
<dl>
  <dt onclick="DisplayList()">
    球星列表6
  </dt>
  <dd>罗纳尔多</dd>
  <dd>贝克汉姆</dd>
  <dd>齐达内</dd>
  <dd>内马尔</dd>
  <dd>巴蒂斯图塔</dd>
  <dd>梅西</dd>
</dl>
</div>
</body>
</html>

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I hope this article will be helpful to everyone’s JavaScript programming design.