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POfilling innerhtml of dropdown menu with specific data
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2013-02-14T10:03:07.173
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2013-02-16T12:49:22.710
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<p>I have a xmlhttp/php problem. I have one drop-down menu where people are able to select municipality. Then I want to return a list of possible options within that municipality to a secondary drop-down menu.</p> <p>people first select a municipality (html code below):</p> <pre><code><select name="pszplaats" id="gemeente" onchange="fdisplay();loadXMLDoc(this.value)"> <?php while($row=mysql_fetch_array($selectgem)){?> <option value="<?php echo $row['Gemeente']; ?>"><?php echo $row['Gemeente'];?> </option> <?php } ?> </select> </code></pre> <p>loadXMLDoc is the function that should send this answer to the (php-)server and retreive a list of names matching those in that municipality. so far my relevant java/xml/ajax code is this:</p> <pre><code>function loadXMLDoc() { var xmlhttp; gem=document.getElementById("gemeente").value; if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("test").innerHTML=xmlhttp.responseText; } } xmlhttp.open("POST","http://www.doenwatikkan.nl/jeroen/dynamic.php",true); xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); xmlhttp.send(); alert(gem) } </code></pre> <p>Alert(gem) shows the selected option, so I know that at least this works. the php to retreive the right values is this:</p> <pre><code>$gem=$_POST["pszplaats"]; $gennam=mysql_query("SELECT * FROM psz WHERE Gemeente=$gem"); echo $gennam["$gem"]; </code></pre> <p>now the problem lies in the filling of the secondary drow-down menu</p> <pre><code><select name="psznaam" id="test" style="display:none"> <?php while($row=mysql_fetch_array($selectall)){?> <option value="<?php echo $row['NaamPSZ']; ?>"><?php echo $row['NaamPSZ'];?> </option> <?php } ?> </select> </code></pre> <p>after the java function is finished the drop-down menu is completely empty. Can anybody tel me how I can actually get the relevant data in that menu? any help would be much appreciated!</p>
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<php><javascript><mysql><ajax><xmlhttprequest>
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filling innerhtml of dropdown menu with specific data
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