js javascript 几个收缩/展开/折叠的js代码 -优快云博客

本文链接：https://blog.youkuaiyun.com/wang_zhi_peng2007/article/details/84688719

本文介绍了三个实用的JavaScript应用案例：通过jQuery控制元素的显示与隐藏、实现内容的动态展开与收起效果、以及利用JavaScript控制表格行的显示隐藏。这些案例不仅展示了JavaScript的基本用法，还涉及DOM操作、事件处理等关键技术。

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javaScript

<!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=gbk" />  
        <title>StripingTable</title>  
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>  
        <script type="text/javascript">  
        <!--   
            $(document).ready(function(){$("#helloDiv").hide(); });   
                
            function changeDisplay(){   
                var helloDivObj = $("#helloDiv");   
                var buttonObj = $("#btnDisplay");   
                var val = buttonObj.attr("value");   
                if(val=="隐藏"){   
                    helloDivObj.hide();   
                    buttonObj.attr("value","显示");   
                }else{   
                    helloDivObj.show();   
                    buttonObj.attr("value","隐藏");   
                }              
    }   
        -->  
        </script>  
    </head>  
    <body>  
           
        <input id="btnDisplay" type="button" value="隐藏" onclick="changeDisplay()" />  
        <div id="helloDiv">  
        Hello,everyone<p></p>  
        Hello,everytwo<p></p>  
        Hello,everythree<p></p>  
        </div>  
    </bdoy>  
</html>

<style> 
#content { 
font-size: 14px; 
width: 100%; 
height: 50px; 
background: #eee; 
padding: 10px; 
border: 4px #ccc double; 
overflow: hidden; 
} 
#key { 
color: red; 
float: right; 
margin-top: -20px; 
} 
span{cursor:pointer;} 
</style> 
<script> 
var s=5; 
var minheight=50; 
var maxheight=450; 
function shoppingcat(){ 
  var content=document.getElementById("content"); 
  var key = document.getElementById("key"); 
  var t=content.style; 
  if(t.height==""||t.height==0) 
    t.height=minheight; 
  var h=parseInt(t.height); 
  if(key.innerHTML=="展开"){ 
    h+=s; 
    t.height=h+"px"; 
    if(h<maxheight){ 
      setTimeout("shoppingcat();",1); 
    }else{ 
      key.innerHTML="关闭"; 
    } 
  }else{ 
    h-=s; 
    t.height=h+"px"; 
    if(h>minheight){ 
      setTimeout("shoppingcat();",1); 
    }else{ 
      key.innerHTML="展开"; 
    } 
  } 
} 
</script> 

<div id="content"><br/> 
<span id="key" onclick="shoppingcat();">展开</span><br/> 
藤床纸帐朝眠起， 

说不尽、无佳思。 

沈香烟断玉炉寒， 

伴我情怀如水。 

笛声三弄， 

梅心惊破， 

多少春情意。 


小风疏雨萧萧地， 

又催下、千行泪。 

吹箫人去玉楼空， 

肠断与谁同倚？ 
一枝折得， 

人间天上， 

没个人堪寄。 

欢迎再次光临 

牛图库特效。 
</div>

<html xmlns="http://www.w3.org/1999/xhtml">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>www.webjx.com</title>
<script language="javascript">
function tablecollapse()
{
/* Variables */
var collapseClass='footcollapse';
var collapsePic='http://webdesign.chinaitlab.com/UploadFiles_8014/200706/20070620173213376.gif';
var expandPic='http://webdesign.chinaitlab.com/UploadFiles_8014/200706/20070620173213394.gif';
var initialCollapse=true;
// loop through all tables
var t=document.getElementsByTagName('table');
var checktest= new RegExp("(^|\\s)" + collapseClass + "(\\s|$)");
for (var i=0;i<t.length;i++)
{
   // if the table has not the right class, skip it
   if(!checktest.test(t[i].className)){continue;}  
   // make the footer clickable
   t[i].getElementsByTagName('tfoot')[0].onclick=function()
   {
    // loop through all bodies of this table and show or hide 
    // them
    var tb=this.parentNode.getElementsByTagName('tbody');
    for(var i=0;i<tb.length;i++)
    {
     tb[i].style.display=tb[i].style.display=='none'?'':'none';
    }   
    // change the image accordingly
    var li=this.getElementsByTagName('img')[0];
    li.src=li.src.indexOf(collapsePic)==-1?collapsePic:expandPic; 
   }
   // if the bodies should be collapsed initially, do so
   if(initialCollapse)
   {
    var tb=t[i].getElementsByTagName('tbody');
    for(var j=0;j<tb.length;j++)
    {
     tb[j].style.display='none';
    }   
   }
   // add the image surrounded by a dummy link to allow keyboard 
   // access to the last cell in the footer
   var newa=document.createElement('a');
   newa.href='#';
   newa.onclick=function(){return false;}
   var newimg=document.createElement('img');
   newimg.src=initialCollapse?expandPic:collapsePic;
   var tf=t[i].getElementsByTagName('tfoot')[0];
   var lt=tf.getElementsByTagName('td')[tf.getElementsByTagName('td').length-1];
   newa.appendChild(newimg);
   lt.insertBefore(newa,lt.firstChild);
}  
}
// run tablecollapse when the page loads
window.onload=tablecollapse;
</script>
<style type="text/css">
body{
font-family:Arial,Sans-Serif;
font-size:90%;
background:#cc9;
}
#boundary{
background:#f8f8f8;
padding:2em;
width:40em;
}
h1{
font-family:"Trebuchet MS",Sans-serif;
text-transform:uppercase;
color:#696;
font-size:120%;
}
table.footcollapse{
width:30em;/* 调整表格宽度*/
}
table.footcollapse caption{
font-size:120%;
text-transform:uppercase;
text-align:left;
padding:.5em 30em;
}
table.footcollapse th{
text-align:left;
}
table.footcollapse,table.footcollapse th,table.footcollapse th
{
border:none;
border-collapse:collapse; 
}
table.footcollapse thead th
{
width:10em;
border-style:solid;
border-width:1px;
border-color:#cff #69c #69c #cff;
background:#9cf;
padding:2px 10px;
}
table.footcollapse tfoot th,
table.footcollapse tfoot td
{
border-style:solid;
border-width:1px;
border-color:#9cf #369 #369 #9cf;
background:#69c;
padding:2px 10px;
}
table.footcollapse tbody{
background:#ddd;
}
table.footcollapse tbody td{
padding:5px 10px;
border:1px solid #999;
}
table.footcollapse tbody th{
padding:2px 10px;
border:1px solid #999;
border-left:none;
}
table.footcollapse tbody tr.odd{
background:#ccc;
}
table.footcollapse tfoot td img{
border:none;
vertical-align:bottom;
padding-left:10px;
float:right;
}

</style>
</head>
<body>
<table summary="CDs I listened to recently" class="footcollapse">
<caption>这个</caption>
<thead>
   <tr>
    <th>列1</th>
    <th>列2</th>
    <th>列3</th>
   </tr>
</thead>
<tfoot>
   <tr>
    <th>结尾1</th>
    <td colspan="2">结尾2</td>
   </tr>
</tfoot>
<tbody>
   <tr>
    <th>值1</th>
    <td>值2</td>
    <td>值3</td>
   </tr>
   <tr class="odd">
    <th>值4</th>
    <td>值5</td>
    <td>值6</td>
   </tr>
   <tr>
    <th>值7</th>
    <td>值8</td>
    <td>值9</td>
   </tr>
   <tr class="odd">
    <th>值10</th>
    <td>值11</td>
    <td>值12</td>
   </tr>
   <tr>
    <th>值13</th>
    <td>值14</td>
    <td>值15</td>
   </tr>
</tbody>
</table>

</body>
</html>