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POChange onclick action with a Javascript function
 

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  1. POChange onclick action with a Javascript function
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    <p>I have a button:</p> <pre><code>&lt;button id="a" onclick="Foo()"&gt;Button A&lt;/button&gt; </code></pre> <p>When I click this button the first time, I want it to execute Foo (which it does correctly):</p> <pre class="lang-javascript prettyprint-override"><code>function Foo() { document.getElementById("a").onclick = Bar(); } </code></pre> <p>What I want to happen when I click the button the first time is to change the onclick function from <code>Foo()</code> to <code>Bar()</code>. Thus far, I've only been able to achieve an infinite loop or no change at all. <code>Bar()</code> would look something like this:</p> <pre class="lang-javascript prettyprint-override"><code>function Bar() { document.getElementById("a").onclick = Foo(); } </code></pre> <p>Thus, clicking this button is just alternating which function gets called. How can I get this to work? Alternatively, what's a better way to show/hide the full text of a post? It originally starts shorted, and I provide a button to "see the full text." But when I click that button I want users to be able to click the button again to have the long version of the text go away.</p> <p>Here's the full code, if it helps:</p> <pre class="lang-javascript prettyprint-override"><code>function ShowError(id) { document.getElementById(id).className = document.getElementById(id).className.replace(/\bheight_limited\b/, ''); document.getElementById(id+"Text").className = document.getElementById(id+"Text").className.replace(/\bheight_limited\b/, ''); document.getElementById(id+"Button").innerHTML = "HIDE FULL ERROR"; document.getElementById(id+"Button").onclick = HideError(id); } function HideError(id) { document.getElementById(id).className += " height_limited"; document.getElementById(id+"Text").className += " height_limited"; document.getElementById(id+"Button").innerHTML = "SHOW FULL ERROR"; document.getElementById(id+"Button").onclick = "ShowError(id)"; } </code></pre>
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    1. USTony Stark
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    1. COI'm not making this an answer since you are specifically asking about vanilla JavaScript, but you may want to look into jQuery. It's a JavaScript library that can help you do what you are looking to do in your question.
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      1. USJasCav
    2. COKnow about JQuery, can only use Javascript in this case. Thanks.
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    3. COThe `onclick` property should be in all lowercase. https://developer.mozilla.org/en/DOM/element.onclick
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      1. USMatt Ball
 

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