JavaScript Spoiler

<div style="margin:20px; margin-top:5px">
<div class="smallfont" style="margin-bottom:2px"><b>Spoiler</b>: <input 

type="button" value="Show" style="width:45px;font-

size:10px;margin:0px;padding:0px;" onClick="if 

(this.parentNode.parentNode.getElementsByTagName('div')

[1].getElementsByTagName('div')[0].style.display != '') { 

this.parentNode.parentNode.getElementsByTagName('div')

[1].getElementsByTagName('div')[0].style.display = '';        

this.innerText = ''; this.value = 'Hide'; } else { 

this.parentNode.parentNode.getElementsByTagName('div')

[1].getElementsByTagName('div')[0].style.display = 'none'; this.innerText = 

''; this.value = 'Show'; }">
</div>
<div class="alt2" style="margin: 0px; padding: 6px; border: 1px inset;">
<div style="display: none;">

THIS TEXT IS HIDDEN

</div>
</div>
</div>