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javascript - one image,two actions

I am looking for javascript command that would do the following:
Click on image -> open spoiler
Click on image again -> hide spoiler
Here is what I got so far:
javascript in my html
<script>
function myFunction() {
document.getElementById("prvy").innerHTML = document.getElementById('spoiler_id').style.display='';}
</script>
Spoiler
<a id="show_id"
onclick="document.getElementById('spoiler_id').style.display=''; document.getElementById('show_id').style.display='none';"
class="link"></a><span id="spoiler_id"
style="display: none">[Show]<button onclick="document.getElementById('spoiler_id').style.display='none';
document.getElementById('show_id').style.display='';"
class="link">[Hide]</button>
<br><h1 id="bz">Heading</h1><br><br><p>text</p></span>
And my button:
<div id="prvy" onclick="myFunction()"></div>
What I managed to do, is to click on a image, wich will open spoiler. Hovewer, I've been unable to do the second part, onclick again it will close the spoiler.
I also did serach for solution alredy, nothing worked for me, not even this: Link
I also tired if{} else{} statement but didn't work for me either.
Help would be really appreciated, as I am getting desperate on this one.

You can use jQuery .toggle() to toggle show/hide
$("#prvy").click(function() {
$("#spoiler_id").toggle();
});
Note : You need to include jQuery in your document as
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Working snippet :
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a id="show_id"
onclick="document.getElementById('spoiler_id').style.display=''; document.getElementById('show_id').style.display='none';"
class="link"></a><span id="spoiler_id"
style="display: none">[Show]<button onclick="document.getElementById('spoiler_id').style.display='none';
document.getElementById('show_id').style.display='';"
class="link">[Hide]</button>
<br><h1 id="bz">Heading</h1><br><br><p>text</p></span>
<div id="prvy" onclick="myFunction()">button</div>
<script>
$("#prvy").click(function() {
$("#spoiler_id").toggle();
});
</script>

In the JavaScript where you click the button use the simple jQuery function toggle.
$('#spoiler_id').toggle();
Toggle will hide the element selected if it is currently shown or display the element if it is currently hidden.

you would need some state that flips when the function is called.
like this.
<script>
var state = false;
function myFunction() {
state = !state;
if(state){
//do something
}else{
//do something else
}
}
</script>

Is that all of your code, it would be easier for you and less confusing too if you just gave the buttons an on click function and then called that function in your js.
Can I see all of your html

I am giving an example to concerned question using javascript.
HTML:
<script type="text/javascript">
var permit = 'true';
function showhide() {
var getcont = document.getElementsByClassName('hidshowcont');
if (permit === 'true') {
permit = 'false';
getcont[0].style.display = 'block';
}
else {
permit = 'true';
getcont[0].style.display = 'none';
}
}
</script>
<style type="text/css">
.hidshowcont{
height: 200px;
width: 300px;
border: 1px solid #333333;
display: none;
}
</style>
<img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR1cSDTn18ufwjuMihttTvCPJOnFY-4hxbPcaOVd87nSPaQakbP9IERaQ" />
<br />
<br />
<div class="hidshowcont">
This is an example of hide and show the container by clicking of an image.
</div>
This will help u much

Javascript Remove specific attribute from style

Hello i have started to learn Javascript and i was wondering if there is a way to remove a specific attribute from the style here is an example that explain what i mean
<div id="divbrd" style="width:500px; height:350px; border:1px solid #000; box-shadow:10px 5px 10px #777;"></div>
this is a div tag with a style so if i want to remove the box-shadow from the style attribute how can i do this here is what i have done :
<script type="text/javascript">
var div_brd = document.getElementById("divbrd");
div_brd.removeAttribute("style","box-shadow");
</script>
correct me please ...
thanks

Try this
<script type="text/javascript">
var div_brd = document.getElementById("divbrd");
div_brd.style.boxShadow = "none";
</script>
Fiddle:
In this fiddle there is box shadow on div but it's removing from js

just in case if you want to learn jquery also.
$('#divbrd').css("box-shadow", "");

this will remove the attribute
<script type="text/javascript">
var div_brd = $("#divbrd");
div_brd.style.boxShadow = "none";
</script>
OR
<script type="text/javascript">
$('#divbrd').css("box-shadow", "none");
</script>

Displaying or Hiding Divs

I have read probably 50 articles that say how to hide or show div's depend on a click action. However, I have tried almost every approach and my div's do not hide or show. Seems likely I am missing something very basic.
<script>
$(document).ready(function(){
$('buynav').on('click',function(){
document.getElementById('buycontent').style.display = 'block';
document.getElementById('sellcontent').style.display = 'none';
});
$('sellnav').on('click',function(){
document.getElementById('buycontent').style.display = 'none';
document.getElementById('sellcontent').style.display = 'block';
});
});
</script>
<div id="contentContainer">
<div id="documentSpace" style="left: 50%; top: 50px">
<div id="headerPhoto" style="position:absolute;left:2.5%;width:95%; height:200px; background-image:url('../images/jpgHeader4.jpg'); background-size:cover;background-position:center; background-repeat:no-repeat;border-radius:9px; margin-top:17px;">
</div>
<div id="secondNav" style="position:absolute;left:2.5%;width:95%;height:75px;top:250px;text-align:center;vertical-align:middle;">
<div id="buynav" class="buynav"><h2>Buy</h2></div>
<div id="sellnav" class="sellnav"><h2>Sell</h2></div>
</div>
<div id="sellcontent" style="position:absolute;left:2.5%;width:95%;height:100%;top:350px;display:none;">
</div>
<div id="buycontent" style="position:absolute;left:2.5%;width:95%;height:100%;top:350px;display:block">
</div>
</div>
</div>

Use jQuerys show() and hide() as such:
<script>
$(document).ready(function(){
$('#buynav').on('click',function(){
$('#buynav').show();
$('#sellnav').hide();
});
$('#sellnav').on('click',function(){
$('#buynav').hide();
$('#sellnav').show();
});
});
</script>
Another option is to use jQuery's toggle(), but it requires you to have hidden one element before using it.
<script>
$(document).ready(function(){
$('#buynav').on('click',function(){
$('#buynav').toggle();
$('#sellnav').toggle();
});
$('#sellnav').on('click',function(){
$('#buynav').toggle();
$('#sellnav').toggle();
});
});
</script>
Also I added # in the $('#buynav') and other JS selectors. And, as #mdesdev, pointed out you can replace the document.getElementById('buycontent') with $('#buynav') and $('#sellnav') as they seem to "exist" within your jQuery scope.

I think you have forget to put # for your id.
$('#buynav, #sellnav').on('click',function(){
$('#buycontent').toggle();
$('#sellcontent').toggle();
});
Hope it works

Show/Hide a form in JavaScript

I'm trying to hide and show "form1". But even simply hiding doesn't work.
Where is the mistake?
<body>
<script type="text/javascript">
document.getElementById("F1").style.visibility = "hidden";
</script>
<form id="F1" name="form1">
<p class="style14">blah-blah
<input type="text" size="1" name="rd"> blah
</p>
</form>
</body>

Firstly you need to make sure your script tag is at the bottom of the body or use the DOMContentLoaded event
like so
document.addEventListener('DOMContentLoaded', function(){
var form = document.getElementById('F1');
form.style.visibility="hidden";
// OR
form.style.display = 'none';
});
Your F1 needs to be a string, right now you're referring to a undefined variable.
And I also recommend using display instead of visibility
#update to comment.
The opposites of them are
visibility: visible;
AND
display: block; // Or whatever

This line is wrong
document.getElementById(thediv).style.visibility="hidden";
What is "thediv" you should use :
document.getElementById("F1").style.visibility="hidden";

Try document.getElementById("F1").style.visibility=hidden;

F1 should be wrapped in quotes. You also might need to encompass your code within the onload function
window.onload = function(){
document.getElementById("F1").style.visibility = "hidden";
}

How do I make a textarea an ACE editor?

I'd like to be able to convert specific textareas on a page to be ACE editors.
Does anyone have any pointers please?
EDIT:
I have the the editor.html file working with one textarea, but as soon as I add a second, the second isn't converted to an editor.
EDIT 2:
I decided to scrap the idea of having several, and instead open one up in a new window. My new predicament is that when I hide() and show() the textarea, the display goes awry. Any ideas?

As far as I understood the idea of Ace, you shouldn't make a textarea an Ace editor itself. You should create an additional div and update textarea using .getSession() function instead.
html
<textarea name="description"/>
<div id="description"/>
js
var editor = ace.edit("description");
var textarea = $('textarea[name="description"]').hide();
editor.getSession().setValue(textarea.val());
editor.getSession().on('change', function(){
textarea.val(editor.getSession().getValue());
});
or just call
textarea.val(editor.getSession().getValue());
only when you submit the form with the given textarea. I'm not sure whether this is the right way to use Ace, but it's the way it is used on GitHub.

Duncansmart has a pretty awesome solution on his github page, progressive-ace which demonstrates one simple way to hook up an ACE editor to your page.
Basically we get all <textarea> elements with the data-editor attribute and convert each to an ACE editor. The example also sets some properties which you should customize to your liking, and demonstrates how you can use data attributes to set properties per element like showing and hiding the gutter with data-gutter.
// Hook up ACE editor to all textareas with data-editor attribute
$(function() {
$('textarea[data-editor]').each(function() {
var textarea = $(this);
var mode = textarea.data('editor');
var editDiv = $('<div>', {
position: 'absolute',
width: textarea.width(),
height: textarea.height(),
'class': textarea.attr('class')
}).insertBefore(textarea);
textarea.css('display', 'none');
var editor = ace.edit(editDiv[0]);
editor.renderer.setShowGutter(textarea.data('gutter'));
editor.getSession().setValue(textarea.val());
editor.getSession().setMode("ace/mode/" + mode);
editor.setTheme("ace/theme/idle_fingers");
// copy back to textarea on form submit...
textarea.closest('form').submit(function() {
textarea.val(editor.getSession().getValue());
})
});
});
textarea {
width: 100%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.2.9/ace.js"></script>
<textarea name="my-xml-editor" data-editor="xml" data-gutter="1" rows="15"></textarea>
<br>
<textarea name="my-markdown-editor" data-editor="markdown" data-gutter="0" rows="15"></textarea>

You can have multiple Ace Editors. Just give each textarea an ID and create an Ace Editor for both IDS like so:
<style>
#editor, #editor2 {
position: absolute;
width: 600px;
height: 400px;
}
</style>
<div style="position:relative; height: 450px; " >
<div id="editor">some text</div>
</div>
<div style="position:relative; height: 450px; " >
<div id="editor2">some text</div>
</div>
<script src="ace.js" type="text/javascript" charset="utf-8"></script>
<script src="theme-twilight.js" type="text/javascript" charset="utf-8"></script>
<script src="mode-xml.js" type="text/javascript" charset="utf-8"></script>
<script>
window.onload = function() {
var editor = ace.edit("editor");
editor.setTheme("ace/theme/twilight");
var XmlMode = require("ace/mode/xml").Mode;
editor.getSession().setMode(new XmlMode());
var editor2 = ace.edit("editor2");
editor2.setTheme("ace/theme/twilight");
editor2.getSession().setMode(new XmlMode());
};
</script>

To create an editor just do:
HTML:
<textarea id="code1"></textarea>
<textarea id="code2"></textarea>
JS:
var editor1 = ace.edit('code1');
var editor2 = ace.edit('code2');
editor1.getSession().setValue("this text will be in the first editor");
editor2.getSession().setValue("and this in the second");
CSS:
#code1, code2 {
position: absolute;
width: 400px;
height: 50px;
}
They must be explicitly positioned and sized. By show() and hide() I believe you are referring to the jQuery functions. I'm not sure exactly how they do it, but it cannot modify the space it takes up in the DOM. I hide and show using:
$('#code1').css('visibility', 'visible');
$('#code2').css('visibility', 'hidden');
If you use the css property 'display' it will not work.
Check out the wiki here for how to add themes, modes, etc... https://github.com/ajaxorg/ace/wiki/Embedding---API
Note: they do not have to be textareas, they can be whatever element you want.

For anyone that just wants a minimal, working example of using Ace from the CDN:
<!DOCTYPE html>
<html lang="en">
<body style="margin:0">
<div id="editor">function () {
console.log('this is a demo, try typing!')
}
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.1.01/ace.js" type="text/javascript" charset="utf-8"></script>
<script>
var editor = ace.edit("editor");
editor.setTheme("ace/theme/monokai");
editor.getSession().setMode("ace/mode/javascript");
document.getElementById("editor").style.height = "120px";
</script>
</body>
</html>