Onchange select option display a another select option

Discussion in 'PHP' started by bals, Sep 7, 2012.

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  1. #1
    onchange select option based on display another select option
     
    bals, Sep 7, 2012 IP
  2. jestep

    jestep Prominent Member

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    #2
    Either make the onchange event post the page to itself, and use logic to create another dropdown, or use ajax to dynamically populate the second dropdown.
     
    jestep, Sep 7, 2012 IP
  3. bals

    bals Peon

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    #3
    Hi Jestep Nice idea, i also try that it works but thr was some problem, when am selects my 1st dropdown its display a second dropdown , but the value of 1st dropdown will goes to the default value.. I use the following code if u have any idea means feel free to share me..


    <body>
    <table><tr><td>
    <form name="f" action="" method="POST">
    Year : <select name="caryear" onchange='javascript:getmake(this.value);'>
    <option value="0">0</option>
    <option value="2012">2012</option>
    <option value="2011">2011</option>
    <option value="2010">2010</option>
    <option value="2009">2009</option>
    </select>
    <form>
    <?php
    echo $idvalue= $_GET['Value1'];
    //alert($idvalue);
    ?>
    <br>

    <script type='text/javascript'>
    function getmake(year)
    {
    var y=year;
    window.location.href = "done.php?Value1=" +y;
    //alert($var);
    }
    </script>



    <form name="ff" action="" method="POST">

    <?php
    $caryear=$idvalue;
    $query="SELECT Distinct carmake FROM car where caryear= '$caryear'";
    $result = mysql_query($query);
    echo '<br>Car MAKE<select name="selcarmake" onchange="javascript:getmodel(this.value);">';
    while($nt=mysql_fetch_array($result))
    {
    $name = $nt['carmake'];
    echo '<option value="' . $name . '" >' . $name . '</option>';
    }
    echo '</select>';


    ?>

    </script>
    </form>
    <script type='text/javascript'>
    function getmodel(model)
    {
    var m=model;
    window.location.href = "done.php?Value2=" +m;
    //alert($var);
    }
    </script>
    <?php
    //echo $mvalue= $_GET['Value2'];
    $mvalue= $_GET['Value2'];
    //alert($idvalue);
    ?>
    <form name="fff" action="" method="POST">

    <?php
    $carmake=$mvalue;
    $query="SELECT Distinct carmodel FROM car where carmake= '$carmake'";
    $result = mysql_query($query);
    echo '<br>Car Model<select name="selcarmodel" onchange="javascript:getmodel(this.value);">';
    while($nt=mysql_fetch_array($result))
    {
    $name = $nt['carmodel'];
    echo '<option value="' . $name . '" >' . $name . '</option>';
    }
    echo '</select>';


    ?>


    <input type="submit" name="submit" value="submit">
    </form>
    <?php
    echo $msg;
    ?>

    </td>

    </tr>
    </table>
    </form>
    </body>
     
    bals, Sep 7, 2012 IP