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copied!<p>Easy peasy.</p> <pre><code>$(function () { var $main = $('#main'), $1 = $('#1'), $2 = $('#2'); $2.hide(); // hide div#2 when the page is loaded $main.click(function () { $1.toggle(); $2.toggle(); }); }); </code></pre> <p><a href="http://jsfiddle.net/mattball/8vbGE/" rel="nofollow noreferrer">jsfiddle demo →</a></p> <hr> <h3>Edit</h3> <p>OP Comment: <em>"Is there anyway i can keep track of which div is visible?"</em></p> <p>There certainly is; it depends on how you want to use it. You can manually maintain a flag:</p> <pre><code>$(function () { var $main = $('#main'), $1 = $('#1'), $2 = $('#2'), $visible; $2.hide(); // hide div#2 when the page is loaded $visible = $1; $main.click(function () { $1.toggle(); $2.toggle(); $visible = ($visible === $1 ? $2 : $1); }); }); </code></pre> <p>Or you can just write a function that figures it out for you:</p> <pre><code>$(function () { var $main = $('#main'), $1 = $('#1'), $2 = $('#2'); $2.hide(); // hide div#2 when the page is loaded $main.click(function () { $1.toggle(); $2.toggle(); }); function whichIsVisible() { if (!$1.is(':hidden')) return $1; if (!$2.is(':hidden')) return $2; } }); </code></pre> <p>As <a href="https://stackoverflow.com/users/305000/jandy">jAndy</a> points out, this function can be written in a more concise/terse form:</p> <pre><code>function whichIsVisible() { return $1.add($2).filter(':visible'); } </code></pre> <p>However, it <strong>is semantically different</strong> from the first version. The first version returns one of:</p> <ul> <li><code>$1</code></li> <li><code>$2</code></li> <li><code>undefined</code></li> </ul> <p>while jAndy's version returns one of:</p> <ul> <li><code>$1</code></li> <li><code>$2</code></li> <li><code>$1.add($2)</code>, a two-element jQuery object</li> <li><code>$()</code>, an empty jQuery object</li> </ul> <p>So they're <strong>not strictly equivalent</strong>.</p>

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