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    <p>What you really need is the <a href="https://developer.mozilla.org/en/DOM/DOM_event_reference/mouseenter" rel="nofollow"><code>mouseenter</code></a> event, which does not bubble (unlike <code>mouseover</code>). From MDN:</p> <blockquote> <p>The synchronous mouseenter DOM event is dispatched when a mouse or another pointing device enters the physical space given to the element or one of its descendants.</p> <p>Similar to mouseover , it differs in that <strong>it doesn't bubble</strong> and that it isn't sent when the pointer is moved from one of its descendants' physical space to its own physical space.</p> </blockquote> <p>Unfortunately, it's <a href="http://www.quirksmode.org/dom/events/index.html#t017" rel="nofollow">not widely supported</a>. One solution is to use jQuery (see <a href="http://api.jquery.com/mouseenter/" rel="nofollow"><code>.mouseenter()</code></a>), which polyfills that event in all the browsers it supports. Another option is to check the element that triggered the event:</p> <pre><code>document.getElementById("parent").addEventListener('mouseover', function(e) { if (e.target.id === "parent") { //Only execute following on parent mouseover document.getElementById("time").innerHTML = new Date; this.childNodes[1].style.display="block"; } }, false); </code></pre> <p>Or <a href="http://blog.stchur.com/2007/03/15/mouseenter-and-mouseleave-events-for-firefox-and-other-non-ie-browsers/" rel="nofollow">see here</a> for what looks at first glance to be a pretty good shim.</p>
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    1. POHow to fire mouse event once for moving over child elements in Javascript?
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    1. USJames Allardice
    1. USJames Allardice
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    1. CO`mouseenter` event is for IE only, and I am talking about pure JS, not jQuery framework.
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      1. USGooglebot
    2. CO@Ali - `mouseenter` is actually in the spec, and is now supported in Firefox, IE and Opera. Hopefully, other browsers will catch up soon.
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      1. USJames Allardice
    3. CObut it is still so soon to be used as a popular event, a majority of users (including me) use webkit browsers.
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