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POpopulating two dropdown list using ajax
 

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  1. POpopulating two dropdown list using ajax
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    <p>I have two dropdowns and I want the second dropdown to get populated on the basis of the data selected from the 1st dropdown</p> <p>Here is my main.php:</p> <pre><code>&lt;?php include('connection.php'); $query_religion="SELECT DISTINCT religion FROM religion_caste_table"; $result_religion = mysql_query($query_religion, $con); ?&gt; &lt;html&gt; &lt;body&gt; &lt;select name="religion" id="religion" style="width: 100px" onChange="showcaste(this.value)"&gt; &lt;?php while($q_rel_data = mysql_fetch_array($result_religion)) {?&gt; &lt;option value="&lt;?php echo $q_rel_data[0]; ?&gt;"&gt; &lt;?php echo $q_rel_data[0]; ?&gt; &lt;/option&gt; &lt;?php }?&gt; &lt;/select&gt; &lt;div id="view"&gt;&lt;/div&gt; &lt;select name="caste" id="caste" style="width: 100px"&gt;&lt;/select&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>And this is getcaste.php:</p> <pre class="lang-php prettyprint-override"><code>&lt;?php include('connection.php'); $string=$_GET["religion"]; $sql="SELECT caste FROM religion_caste_table WHERE religion = '".$string."'"; $result = mysql_query($sql,$con); $myarray=array(); $str=""; while($result_caste=mysql_fetch_array($result)) { $str=$str . "\"$result_caste[caste]\"".","; } $str=substr($str,0,(strLen($str)-1)); // Removing the last char , from the string echo $str;/*Stop hiding from IE Mac */ //echo $string; mysql_close($con); ?&gt; &lt;html&gt; &lt;/html&gt; </code></pre> <p>now for the javascript ajax file,(religion_caste.js)</p> <pre><code>function showcaste(string) { if (string=="") { document.getElementById("caste").innerHTML=""; return; } alert(string); 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 &amp;&amp; xmlhttp.status==200) { document.getElementById("view").innerHTML=xmlhttp.responseText; //now how to catch the string from (getcaste.php), split it and save it into array // and to populate the second dropdwn by the array; } } xmlhttp.open("GET","getcaste.php?religion="+string,true); xmlhttp.send(); } </code></pre> <p>For more better assistance, the database table contains two fields, religion and caste, where the first attribute is religion, and caste being the second.</p> <p>If somehow I can catch the string str, then it could have solved the matter.</p> <p><code>document.getElementById("view").InnerHTML=xmlhttp.responseText</code> provides the string "str1","str2",... to be viewed in <code>&lt;div id="view"&gt;</code></p> <p>But if I write the following code:</p> <pre><code>var string=(document.getElementById("view").InnerHTML); alert(string); </code></pre> <p>Then a msgbox pops up with such view:</p> <pre><code>&lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"&gt; &lt;title&gt;Untitled Document&lt;/title&gt; "Catholic","Protestant" </code></pre> <p>If I could just get the string, I would be happy.</p>
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    1. CObuddy, i was editing my question, u can see it now.... the code has been provided
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    2. COWhy no use jquery?
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