Oh you are clear enough, check this out :
html4strict Code:
<html><head> <title>Spoiler HTML code
</title> <style type="text/css">body,input
{
font-family:"Trebuchet ms",arial;font-size:0.9em;
color:#333;
}
.spoiler
{
border:1px solid #ddd;
padding:3px;
}
.spoiler .inner
{
border:1px solid #eee;
padding:3px;margin:3px;
}
</style> <script type="text/javascript">function showSpoiler(obj)
{
var inner = obj.parentNode.getElementsByTagName("div")[0];
if (inner.style.display == "none")
inner.style.display = "";
else
inner.style.display = "none";
}
</script></head><body><h1>Spoiler HTML w/Js Code by Skrap
</h1><div class="spoiler"> <input type="button" onclick="showSpoiler(this);" value="Show/Hide" /> <div class="inner" style="display:none;"> This is a spoiler!
</div></div></body></html>
Live example
Good luck