How To Make Hide And Show Button

Here's the HTML code on How To Make Hide and Show Button.

<div>
<input value="Show" style="margin: 0px; padding:0px;width:auto;font-size:10px;" onclick="if(this.parentNode.parentNode.getElementsByTagName(&#39;div&#39;)[1].getElementsByTagName(&#39;div&#39;)[0].style.display != &#39;&#39;) { this.parentNode.parentNode.getElementsByTagName(&#39;div&#39;)[1].getElementsByTagName(&#39;div&#39;)[0].style.display = &#39;&#39;; this.innerText = &#39;&#39;; this.value = &#39;Hide&#39;; } else{ this.parentNode.parentNode.getElementsByTagName(&#39;div&#39;)[1].getElementsByTagName(&#39;div&#39;)[0].style.display = &#39;none&#39;; this.innerText = &#39;&#39;; this.value = &#39;Show&#39;; }" type="button" /></div>
<div class="alt2">
<div style="display: none;">
<div style="background:#000000;text-align:left;padding:10px;color:#ffffff;">
Enter the text / image to be Hide and Show in on here
</div>
</div>
</div>