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copied!<pre><code>$('#allContents').on('click', 'div[id^=A]', function() { $('div#B' + this.id.replace('A','')).slideToggle(); }); </code></pre> <h3>A little explain</h3> <ul> <li><code>div[id^=A]</code> point out those <code>div</code> whose <code>id</code> start with <code>A</code>.</li> <li><code>this.id</code> retrieve the <code>id</code> of clicked element.</li> <li><code>this.id.replace('A','')</code> replace <code>A</code> form the <code>id</code> and get the numeric index which equal to index of <code>B</code>.</li> <li><code>$('div#B' + this.id.replace('A',''))</code> point to element <code>id=B1</code>, <code>id=B2</code> and so on.</li> </ul> <p><strong>Full code</strong></p> <pre><code>// you can bind event handler outside ot loop $('#allContents').on('click', 'div[id^=A]', function() { $('div#B' + this.id.replace('A','')).slideToggle(); }); $.each(items, function(index, item) { $("#allContents").append('<div id="A' + i + '">' + item.name + '</div>'); $("#allContents").append('<div id="B' + i + '">' + item.Details + '</div>'); i++; }); </code></pre> <p><strong><a href="http://jsfiddle.net/vQzSv/9/" rel="nofollow">Working Sample</a></strong></p> <hr> <h3>Note</h3> <p>As you're creating <code>div</code> from <code>A(1..N)</code> and <code>B(1..N)</code> dynamically so you need delegate event handler (aka live event).</p> <p>Syntax of jQuery <strong><a href="http://api.jquery.com/on" rel="nofollow"><code>.on()</code></a></strong> for delegate event is like following:</p> <pre><code>$(container).on(eventName, target, handlerFunction) </code></pre>

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