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    <p>Think you best use option value $rows['Key'] in first dropdown menu and add an jQuery selector that takes the selected value and gets te corresponding contracts for that key.</p> <p>Should be something like this..</p> <p>PHP CODE</p> <pre><code>$query = "SELECT Key, Short FROM product WHERE Active = 1 OR Short LIKE 'Blue%'"; $run = mysql_query($query) or die(mysql_error()); echo 'Product: &lt;br /&gt;'; ?&gt; &lt;select id="select2" name="select2"&gt; &lt;?php echo "&lt;option selected='selected'&gt;-Select product-&lt;/option&gt;"; while($rows = mysql_fetch_assoc($run)) { echo "&lt;option value='".$rows['Key']."'&gt;".$rows['Short']."&lt;/option&gt;"; } ?&gt; &lt;/select&gt; </code></pre> <p>jQUERY CODE</p> <pre><code>$("select#select2").change(function(){ $.ajax({ type: "GET", url: "URL_TO_GET_CONTRACTS_FOR_KEY", data: "selected_key=" + $(this).val(), success: function(result) { $("select#NEWSELECT").html(result); } }); }); </code></pre> <p>Explanation: URL_TO_GET_CONTRACTS_FOR_KEY is an url to a PHP file you have to write. In that file you have access to $_GET['selected_key'], use that value to get the contracts for that key. In that file you should echo the "" tags for the second select. Like this:</p> <pre><code>&lt;?php ## URL_TO_GET_CONTRACTS_FOR_KEY ## $selectedKey = $_GET['selected_key']; $query = .. $run = .. while($row = mysql_fetch_assoc($run)) { echo "&lt;option value='..'&gt;..&lt;/option&gt;"; } ?&gt; </code></pre> <p>NEWSELECT should be replaced by the id of the select where the returned options should be placed in.</p>
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    1. COHey, which URL do I put under the url? And how do I then put the selected one inside another dropdown menu?
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    2. COedited the post above: added an explanation section. This should help you
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    3. COOk, thanks for help :) So what all I need to put in file (url)?
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