js implements super simple expansion and folding directory code_javascript skills

The example in this article describes the ultra-simple expansion and folding directory code implemented in js. Share it with everyone for your reference. The details are as follows:

Here we introduce a super simple directory, expand the menu code, click the mouse to expand, click again to collapse, similar to the function of the tree menu, I have seen it a lot on the Internet, I won’t introduce it in detail, welcome to refer to it.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-show-hidden-list-menu-codes/

The specific code is as follows:

<title>可折叠展开的简单目录</title>
<style>
div{
font-size:12px;
color:red;
background-color: #EAEAE8;
border: 1 solid #1892B5;
padding: 1
}
</style>
<div id="main1" style="color:blue" onclick="document.all.child1.style.display=(document.all.child1.style.display =='none')&#63;'':'none'" > 
+ 主目录1</div> 
<div id="child1" style="display:none"> 
<a href="#">- 子目录1</a> <br> 
<a href="#">- 子目录2</a> <br> 
<a href="#">- 子目录3</a> <br> 
<a href="#">- 子目录4</a> 
</div> 
<div id="main2" style="color:blue" onclick="document.all.child2.style.display=(document.all.child2.style.display =='none')&#63;'':'none'" > 
+ 主目录2 </div> 
<div id="child2" style="display:none"> 
<a href="#">- 子目录1</a> <br> 
<a href="#">- 子目录2</a> <br> 
<a href="#">- 子目录3</a> 
</div>

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