Controls the display and hiding of text content

 
<a href="javascript:void(0);" id="open" onclick="document.getElementById('content').style='display:block'; 
document.getElementById('open').style='display:none'; 
document.getElementById('hidden').style='display:block;'" style="display:block"> an </a> 
<a href="javascript:void(0);" id="hidden" type="hidden" onclick="document.getElementById('content').style='display:none'; 
document.getElementById('hidden').style='display:none'; 
document.getElementById('open').style='display:block';" style="display:none"> Shut down </a> 
<div id="content" class="a" style="display:none"> 
<p> Scripting house provides the latest network programming, scripting, web production, web design, web effects for webmasters and network programming practitioners to provide learning materials </p> 
</div>