记住链式下拉列表中的选定值

时间：2013-02-07 15:10:53

标签： php javascript mysql drop-down-menu chained

我有一个链接下拉菜单，其中包含我数据库中的数据......

它的外观如下：

func.php 

<?php
//**************************************
//     Page load dropdown results     //
//**************************************
function getTierOne()
{
    $result = mysql_query("SELECT DISTINCT make FROM vehicles ORDER BY make ASC") 
    or die(mysql_error());

      while($tier = mysql_fetch_array( $result )) 

        {
?>
<option value="<?php echo $tier['make'];?>"<?php echo (isset($_POST['drop_1']) && $_POST['drop_1'] == $tier['make']) ? ' selected="selected"' : '' ; ?>><?php echo $tier['make'];?></option>
<?php

        }

}

//**************************************
//     First selection results     //
//**************************************
if (isset($_GET['func'])&& $_GET['func'] == "drop_1" ) {
drop_1($_GET['drop_var']);
}

function drop_1($drop_var)
{  
    include_once('db.php');
    $result = mysql_query("SELECT DISTINCT model FROM vehicles WHERE make='$drop_var' ORDER BY model") 
    or die(mysql_error());

    echo '<select name="drop_2" id="drop_2">
          <option value=" " disabled="disabled" selected="selected">Selecteer Model</option>';

           while($drop_2 = mysql_fetch_array( $result )) 
            {
              echo '<option value="'.$drop_2['model'].'">'.$drop_2['model'].'</option>';
            }

    echo '</select>';
    echo "<script type=\"text/javascript\">
$('#wait_2').hide();
    $('#drop_2').change(function(){
      $('#wait_2').show();
      $('#result_2').hide();
      $.get(\"func.php\", {
        func: \"drop_2\",
        drop_var: $('#drop_1').val(),
        drop_var2: $('#drop_2').val()
      }, function(response){
        $('#result_2').fadeOut();
        setTimeout(\"finishAjax_tier_three('result_2', '\"+escape(response)+\"')\", 400);
      });
        return false;
    });
</script>";
}

//**************************************
//     Second selection results     //
//**************************************
if (isset($_GET['func'])&& $_GET['func'] == "drop_2" ) {
drop_2($_GET['drop_var'], $_GET['drop_var2']);
}

function drop_2($drop_var, $drop_var2)
{  
    include_once('db.php');
    $result = mysql_query("SELECT DISTINCT year FROM vehicles WHERE make='$drop_var' AND model='$drop_var2'") 
    or die(mysql_error());

    echo '<select name="drop_3" id="drop_3">
          <option value=" " disabled="disabled" selected="selected">Selecteer Jaar</option>';

           while($drop_3 = mysql_fetch_array( $result )) 
            {
              echo '<option value="'.$drop_3['year'].'">'.$drop_3['year'].'</option>';
            }

    echo '</select>';
    echo "<script type=\"text/javascript\">
$('#wait_3').hide();
    $('#drop_3').change(function(){
      $('#wait_3').show();
      $('#result_3').hide();
      $.get(\"func.php\", {
        func: \"drop_3\",
        drop_var: $('#drop_1').val(),
        drop_var2: $('#drop_2').val(),
        drop_var3: $('#drop_3').val()
      }, function(response){
        $('#result_3').fadeOut();
        setTimeout(\"finishAjax_tier_four('result_3', '\"+escape(response)+\"')\", 400);
      });
        return false;
    });
</script>";
}

//**************************************
//     Third selection results     //
//**************************************
if (isset($_GET['func'])&& $_GET['func'] == "drop_3" ) {
drop_3($_GET['drop_var'], $_GET['drop_var2'], $_GET['drop_var3']);
}

function drop_3($drop_var, $drop_var2, $drop_var3)
{  
    include_once('db.php');
        $result = mysql_query("SELECT DISTINCT color FROM vehicles WHERE make='$drop_var' AND model='$drop_var2' AND year='$drop_var3'") 
    or die(mysql_error());  

    echo '<select name="drop_4" id="drop_4">
          <option value=" " disabled="disabled" selected="selected">Selecteer Kleur</option>';

           while($drop_4 = mysql_fetch_array( $result )) 
            {
                if ($drop_4['color'] != "") {
              echo '<option value="'.$drop_4['color'].'">'.$drop_4['color'].'</option>';
                }
            }

    echo '</select>';
    echo "<script type=\"text/javascript\">
$('#wait_4').hide();
    $('#drop_4').change(function(){
      $('#wait_4').show();
      $('#result_4').hide();
      $.get(\"func.php\", {
        func: \"drop_4\",
        drop_var: $('#drop_1').val(),
        drop_var2: $('#drop_2').val(),
        drop_var3: $('#drop_3').val(),
        drop_var4: $('#drop_4').val()
      }, function(response){
        $('#result_4').fadeOut();
        setTimeout(\"finishAjax_tier_five('result_4', '\"+escape(response)+\"')\", 400);
      });
        return false;
    });
</script>";
}

//**************************************
//     Fourth selection results     //
//**************************************
if(isset($_GET['func'])&& $_GET['func'] == "drop_4" ) {
drop_4($_GET['drop_var'], $_GET['drop_var2'], $_GET['drop_var3'], $_GET['drop_var4']);
}
function drop_4($drop_var, $drop_var2, $drop_var3, $drop_var4)
{  
    include_once('db.php');
        $result = mysql_query("SELECT * FROM vehicles WHERE make='$drop_var' AND model='$drop_var2' AND year='$drop_var3' AND color='$drop_var4'") 
    or die(mysql_error());  



           while($drop_5 = mysql_fetch_array( $result )) 
                {
                if ($drop_5['img'] != "") {
              echo '<input type="checkbox" name="drop_5" id="drop_5" style="display:none;" checked value="'.$drop_5['img'].'"/>';

                }
  }
    echo '<input type="submit" name="submit" value="Submit" />';
}

?>

这是我的index.php 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <link href="includes/css/style.css" type="text/css" rel="stylesheet" />
        <link href="includes/css/wt-gallery.css" type="text/css" rel="stylesheet" />
        <script type="text/javascript" src="includes/js/jquery-1.7.1.min.js"></script>
        <script type="text/javascript" src="includes/js/configuratie.js"></script>
        <script type="text/javascript" src="includes/js/jquery.wt-gallery.min.js"></script>
        <script type="text/javascript">
$(document).ready(function() {
    $('#wait_1').hide();
    $('#drop_1').change(function(){
      $('#wait_1').show();
      $('#result_1').hide();
      $.get("func.php", {
        func: "drop_1",
        drop_var: $('#drop_1').val()
      }, function(response){
        $('#result_1').fadeOut();
        setTimeout("finishAjax('result_1', '"+escape(response)+"')", 400);
      });
        return false;
    });
    $('#wait_2').hide();
    $('#drop_2').change(function(){
      $('#wait_2').show();
      $('#result_2').hide();
      $.get("func.php", {
        func: "drop_2",
        drop_var: $('#drop_2').val()
      }, function(response){
        $('#result_2').fadeOut();
        setTimeout("finishAjax2('result_2', '"+escape(response)+"')", 400);
      });
        return false;
    });
    $('#wait_3').hide();
    $('#drop_3').change(function(){
      $('#wait_3').show();
      $('#result_3').hide();
      $.get("func.php", {
        func: "drop_3",
        drop_var: $('#drop_3').val()
      }, function(response){
        $('#result_3').fadeOut();
        setTimeout("finishAjax3('result_3', '"+escape(response)+"')", 400);
      });
        return false;
    });
});

function finishAjax(id, response) {
  $('#wait_1').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax2(id, response) {
  $('#wait_2').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax3(id, response) {
  $('#wait_3').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}

function finishAjax_tier_three(id, response) {
  $('#wait_2').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax_tier_four(id, response) {
  $('#wait_3').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax_tier_five(id, response) {
  $('#wait_4').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
</script>
        </head>
<?php
$website = "it";
    // configuratie file en db connect
include "includes/inc/config.inc.php";
include('db.php');
include_once "class/slider.class.php";
include('func.php');
$slideralbum = new slideralbum($dbo);
$sliders = $slideralbum->getSliderItems($website);
?>
<body>
<p>
<form name="product" action="" method="post">

    <select name="drop_1" id="drop_1">

      <option value="" selected="selected" disabled="disabled">Selecteer Merk</option>

      <?php getTierOne(); ?>

    </select> 

    <span id="wait_1" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_1" style="display: none;"></span>
    <span id="wait_2" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_2" style="display: none;"></span> 
    <span id="wait_3" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_3" style="display: none;"></span> 
    <span id="wait_4" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_4" style="display: none;"></span> 
  <INPUT TYPE="button" VALUE="Refresh" onclick='location.reload()'>
</form>
</p>
<p>
<?php if(isset($_POST['submit'])){
    $drop = $_POST['drop_1'];
    $drop_2 = $_POST['drop_2'];
    $drop_3 = $_POST['drop_3'];
    $drop_4 = $_POST['drop_4'];
    $drop_5 = $_POST['drop_5'];
?>
<table border="1" bordercolor="#B5B5B5" style="background-color:#FFFFFF" width="250" cellpadding="3" cellspacing="3">
    <tr>
        <td>Merk:</td>
        <td><?php echo $drop;?></td>
    </tr>
    <tr>
        <td>Model:</td>
        <td><?php echo $drop_2;?></td>
    </tr>
    <tr>
        <td>Bouwjaar:</td>
        <td><?php echo $drop_3;?></td>
    </tr>
    <tr>
        <td>Kleur:</td>
        <td><?php echo $drop_4;?></td>
    </tr>
</table>
<?php
}
?>
<div id="banner-block">       <!-- Begin of Slideshow -->
    <div class="container">          
        <div class="wt-gallery" style="width:920px; height:375px;">
            <div class="main-screen">
                                <?php if(isset($_POST['submit'])){
    $drop = $_POST['drop_1'];
    $drop_2 = $_POST['drop_2'];
    $drop_3 = $_POST['drop_3'];
    $drop_4 = $_POST['drop_4'];
    $drop_5 = $_POST['drop_5'];
?>
                    <img src="images/<?php echo $drop_5;?>" alt="<?php echo $drop_5;?>" width="920" height="360"/>
<?php
                    }
?>
                <noscript>
                <!-- placeholder image when javascript is off -->
                <img src="../images/triworks_abstract27.jpg" alt=""/>
                </noscript>
            </div>
            <div class="cpanel">
            <div class="thumbs-back"></div>                        
                <div class="thumbnails">
                    <ul>
<?php $sliders = $slideralbum->getSliderItems($website, NULL);
foreach($sliders as $slider){
?> 
                        <li effect="none">
                    <div>
                        <a href="<?php echo $slider->slider_img; ?>" height="360" width="720" alt="<?php echo $slider->slider_img; ?>" />
                        <img src="<?php echo $slider->slider_tmb; ?>" height="70" width="125" alt="<?php echo $slider->slider_tmb; ?>" />
                        </a>
                    </div>
                    <div class="data">    
                    </div>
                        </li>
<?php
}
?>  
                    </ul>
                </div>          
            <div class="thumbs-fwd"></div>
        </div>
    </div>  
</div>
</div>
</body>
</html>

我想记住提交后每个下拉列表中的选定值。所以我可以轻松改变颜色，而不是再次通过所有下拉菜单......

我让它在第一个下拉列表中工作：

<option value="<?php echo $tier['make'];?>"<?php echo (isset($_POST['drop_1']) && $_POST['drop_1'] == $tier['make']) ? ' selected="selected"' : '' ; ?>><?php echo $tier['make'];?></option>

它应该与其他下拉列表一起工作吗？

是否可以逐一显示下拉菜单？

提前致谢

1 个答案:

答案 0 :(得分：0)

我认为你可以这样做。

<select id="sel1">
    <option value="<?php echo $tier['make'];?>"><?php echo $tier['make'];?></option>
</select>

<script>
    var select = document.getElementById('sel1');
    select.value = <?php echo $tier['make']); ?>
    if (select.selectedIndex != 0) {
        select.style.display = '';  // Show the element
    }
</script>

只需在每个选择标记后添加一个脚本标记（如果需要，可以在底部添加），并检查是否从下拉列表中选择了任何选项，如果是，则将其设为可见。

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