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    <p>Since originally writing this answer, a new specification has reached <em>recommendation</em> status thanks to the W3C. The <a href="http://www.w3.org/TR/page-visibility/" rel="noreferrer">Page Visibility API</a> (on <a href="https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API" rel="noreferrer">MDN</a>) now allows us to more accurately detect when a page is hidden to the user.</p> <p>Current browser support:</p> <ul> <li>Chrome 13+</li> <li>Internet Explorer 10+</li> <li>Firefox 10+</li> <li>Opera 12.10+ <sup>[<a href="https://dev.opera.com/blog/page-visibility-api-support-in-opera-12-10/" rel="noreferrer">read notes</a>]</sup></li> </ul> <p>The following code makes use of the API, falling back to the less reliable blur/focus method in incompatible browsers.</p> <pre><code>(function() { var hidden = "hidden"; // Standards: if (hidden in document) document.addEventListener("visibilitychange", onchange); else if ((hidden = "mozHidden") in document) document.addEventListener("mozvisibilitychange", onchange); else if ((hidden = "webkitHidden") in document) document.addEventListener("webkitvisibilitychange", onchange); else if ((hidden = "msHidden") in document) document.addEventListener("msvisibilitychange", onchange); // IE 9 and lower: else if ("onfocusin" in document) document.onfocusin = document.onfocusout = onchange; // All others: else window.onpageshow = window.onpagehide = window.onfocus = window.onblur = onchange; function onchange (evt) { var v = "visible", h = "hidden", evtMap = { focus:v, focusin:v, pageshow:v, blur:h, focusout:h, pagehide:h }; evt = evt || window.event; if (evt.type in evtMap) document.body.className = evtMap[evt.type]; else document.body.className = this[hidden] ? "hidden" : "visible"; } // set the initial state (but only if browser supports the Page Visibility API) if( document[hidden] !== undefined ) onchange({type: document[hidden] ? "blur" : "focus"}); })(); </code></pre> <p><code>onfocusin</code> and <code>onfocusout</code> are <a href="http://www.thefutureoftheweb.com/blog/detect-browser-window-focus" rel="noreferrer">required for IE 9 and lower</a>, while all others make use of <code>onfocus</code> and <code>onblur</code>, except for iOS, which uses <code>onpageshow</code> and <code>onpagehide</code>.</p>
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    1. POIs there a way to detect if a browser window is not currently active?
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    1. USPaweł Szczur
    1. USAndy E
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    1. COPerfect... I didn't ever think I needed to do this, until my boss asked me to implement it!
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      1. USSteve Hill
    2. COAlso consider http://stackoverflow.com/questions/831686/how-can-i-detect-whether-a-browser-window-is-focused-or-not to detect it for the first.
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      1. USAli Shakiba
    3. COHow would you tell the difference between the case when user puts the tab in background and the case where she just switches to other (i)frame?
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      1. USbellpeace
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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