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    <p>You need to have a way to call the closure that you have created to use it within the <code>onclick</code> attributes. The advantage of having <code>closure1</code> as a global variable is that the closure is created just once and you can re-use it throught the page by just calling <code>closure1(num, index)</code>. If however you don't like to have a variable named <code>closure1</code> in your global scope you could <em>clean up</em> in the following way.</p> <p><strong>EDIT :</strong> I had posted two suggested ways earlier. Thanks to @nnnnnn for pointing out that one of the ways would break the OP's code. I have removed the incorrect suggestion and left the correct suggestion as it is.</p> <p>You could add closures as properties to the existing <code>Closure</code> function. For example, if you want to create a new closure <code>closure1</code> you should create it like this</p> <p>Remove the line:</p> <pre><code>var closure1=Closure(0, 0); </code></pre> <p>add the following line <em>AFTER</em> the <code>Closure</code> function has been defined, like so:</p> <pre><code>Closure.closure1 = Closure(0, 0); </code></pre> <p>and replace your onclicks with</p> <pre><code>&lt;div id="d1" onclick="Closure.closure1(2,0)"&gt;2 index 0&lt;/div&gt; </code></pre> <p>The complete code would then look as follows:</p> <pre><code>&lt;script&gt; function Closure(num, i) { var num=num; var index=i; var anArray = []; return function(num,index) { anArray[index]=(num); out.innerHTML=anArray; } } Closure.closure1 = Closure(0, 0); &lt;/script&gt; &lt;div id="d1" onclick="Closure.closure1(2,0)"&gt;2 index 0&lt;/div&gt; &lt;div id="d2" onclick="Closure.closure1(5,3)"&gt;5 index 3&lt;/div&gt; &lt;div id="d3" onclick="Closure.closure1(4,1)"&gt;4 index 1&lt;/div&gt; &lt;div id="d4" onclick="Closure.closure1(9,7)"&gt;9 index 7&lt;/div&gt; &lt;div id="out" &gt;?&lt;/div&gt; </code></pre> <p>This is the cleanest approach in my opinion. Hope this helps.</p>
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    1. COYour option 1 is not an equivalent to the OP's code because each instance would have its own array instead of sharing the same array.
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    2. COhaving trouble getting the code to work. Where does "Closure.closure1 = Closure(0, 0);" go? I've tried it both inside, and outside of the function.
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    3. CO@user1740058 Updated my answer. You need to write the line _after_ the closure function is defined.
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