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    <p>Using Ajax, this is what needs to be done</p> <pre><code>&lt;html&gt;&lt;body&gt; &lt;div id="content"&gt;&lt;/div&gt; .... &lt;script&gt; $(function(){ $.ajax({ url: 'file.php', type: 'GET', data: {h: screen.height, w: screen.width} }).done(function ( data ) { document.getElementById("content").innerHTML=data; }); }); &lt;/script&gt; </code></pre> <p>That file.php would then run your database query and return a nicely formatted set of results (i.e. html table) based on the h and w parameters sent via ajax which tell you the height and width of the screen. To do this just set the $page variable depending on the size of the <code>$_GET['w']</code> and <code>$_GET['h']</code> variables. See below:</p> <pre><code>&lt;?php // get the function include_once ('function.php'); $maxresults = 21; $page = ( $_GET['page'] ? $_GET['page'] : 0 ); if(($_GET['w']) &amp;&amp; ($_GET['h'])) { $w = $_GET['w']; $h = $_GET['h']; //$maxresults = // calculate this depending on w and h // i.e. if h &gt; 1600 $maxresults = 20, else = 10 $currentpage = $page; $page = $page * $maxresults; $numpages = QuickQuery("SELECT COUNT(id) FROM books WHERE visible=1"); $numpages = mysql_result($numpages, 0); $numpages = $numpages/$maxresults-1; $result = GetBooksByRangeID($page, $maxresults);//Show &lt;maxresults&gt; pages at a time //DisplayResults($result); echo $results; // in a nice format (i.e. table) to be inserted into div via ajax ?&gt; </code></pre> <p>You can calculate $maxresults as follows:</p> <pre><code>if($w &gt; 640) &amp;&amp; ($h &gt; 480) $maxresults = 5; if($w &gt; 800) &amp;&amp; ($h &gt; 600) $maxresults = 7; if($w &gt; 1024) &amp;&amp; ($h &gt; 768) $maxresults = 12; .... if($w &gt; 2560) &amp;&amp; ($h &gt; 1600) $maxresults = 21; </code></pre> <p>Or you can group these statements by width (as I think thats less important than height, meaning less scrolling down for the user):</p> <pre><code>if ($w &lt;= 1024) { if ($h &gt;= 768) $maxresults = 12; // 1024x(768 or higher) else if ($h &gt;= 600) $maxresults = 8; // 1024x(600~768) else $maxresults = 6; // 1024x(599 or below) } else if ($w &lt;= 1280) { if ($h &gt;= 1024) $maxresults = 14; // 1280x(1024 or higher) else if ($h &gt;= 960) $maxresults = 12; // 1280x(960~1024) else if ($h &gt;= 800) $maxresults = 10; // 1280x(800~960) else if ($h &gt;= 768) $maxresults = 8; // 1280x(768~800) else $maxresults = 6; // 1280x(768 or below) } //and so on </code></pre> <h2>see: <a href="http://en.wikipedia.org/wiki/Display_resolution#Computer_monitors" rel="nofollow">http://en.wikipedia.org/wiki/Display_resolution#Computer_monitors</a></h2> <p>Revision</p> <p>You code for populating maxresults is very poorly written, thats why it does not work. Try this:</p> <pre><code>&lt;?php include_once ('function.php'); $maxresults = -1; if(($_GET['w']) &amp;&amp; ($_GET['h'])) { $w = $_GET['w']; $h = $_GET['h']; if ($w == 1920) { $maxresults = 24; } else if ($w == 1600) { $maxresults = 24; } else if ($w == 1440){ $maxresults = 12; } else if ($w == 1366) { $maxresults = 10; } else if ($w == 1024) { $maxresults = 8; } else $maxresults = 6; } echo $maxresults; </code></pre> <p>This will either output -1 if w and h are not being sent or it will return 24 or 12 and so on depending on your screen width. Learn to do some basic debugging on your code. It is difficult for me to debug your code without having all of it to hand.</p>
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    1. POGrabbing screen resolution and displaying results based on the size
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    1. POGrabbing screen resolution and displaying results based on the size
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    1. COThe browser will download resources for all screen sizes which is never going to be a good thing.
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    2. COdepends on what the content is, Im sure the OP said something along the lines of a $maxresults variable, which is just a number, not a load of text/images.
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    3. CO@hussman Those max results represent returned results from a database query which could return images .etc, if the data is small it's not much of a problem but not ideal. The problem is we don't know the size of the data returned here.
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