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dependent dropdown help?

Codeman0013

By Codeman0013
in PHP Coding Help

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Codeman0013 Member

Codeman0013

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Posted
Hello, i'm working on a website and i have 4 dropdown's that are on a page and i want to make them dependent. Right now i have them set to pull from the database but i want it set to based on what they select on number 1 it populates number 2 and number 2 populates 3 and 3 does 4 and so on. Can someone take a look at my code and help me to achieve this as i have never done it before and would appreciate any help at all..

[code]<?php require_once('Connections/conn_dj.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
  $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;   
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

mysql_select_db($database_conn_dj, $conn_dj);
$query_rs_industry = "SELECT * FROM tbl_industry ORDER BY industry_name ASC";
$rs_industry = mysql_query($query_rs_industry, $conn_dj) or die(mysql_error());
$row_rs_industry = mysql_fetch_assoc($rs_industry);
$totalRows_rs_industry = mysql_num_rows($rs_industry);

mysql_select_db($database_conn_dj, $conn_dj);
$query_rs_productcategory = "SELECT * FROM tbl_productcat  ORDER BY tbl_productcat.productCat_name";
$rs_productcategory = mysql_query($query_rs_productcategory, $conn_dj) or die(mysql_error());
$row_rs_productcategory = mysql_fetch_assoc($rs_productcategory);
$totalRows_rs_productcategory = mysql_num_rows($rs_productcategory);

mysql_select_db($database_conn_dj, $conn_dj);
$query_rs_product = "SELECT * FROM tbl_products ORDER BY tbl_products.products_name";
$rs_product = mysql_query($query_rs_product, $conn_dj) or die(mysql_error());
$row_rs_product = mysql_fetch_assoc($rs_product);
$totalRows_rs_product = mysql_num_rows($rs_product);

mysql_select_db($database_conn_dj, $conn_dj);
$query_rs_outsidena = "SELECT * FROM intl_countries ORDER BY intl_countries.name";
$rs_outsidena = mysql_query($query_rs_outsidena, $conn_dj) or die(mysql_error());
$row_rs_outsidena = mysql_fetch_assoc($rs_outsidena);
$totalRows_rs_outsidena = mysql_num_rows($rs_outsidena);

mysql_select_db($database_conn_dj, $conn_dj);
$query_rs_state = "SELECT * FROM tbl_states ORDER BY tbl_states.`state`";
$rs_state = mysql_query($query_rs_state, $conn_dj) or die(mysql_error());
$row_rs_state = mysql_fetch_assoc($rs_state);
$totalRows_rs_state = mysql_num_rows($rs_state);
?>
<!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>
<title>DICKEY-john Corporation | Distributors</title>
<link href="_lib/sub.css" rel="stylesheet" type="text/css" />
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="keywords" content="Distributor, Sales, Purchase, U.S., International" />
<meta name="description" content="Enter your zip or postal code to find the DICKEY-john distributor nearest you." />
</head>

<body>
<div id="black">&nbsp;</div>
<div id="siteContainer">
<?php include("_inc/topNav.inc"); ?>
<div id="headerContainer">Distributors</div>
<div class="divContainer"><div class="horizDiv"></div><img src="/_img/divEnd.png" alt="div" height="16" width="4" align="right" /></div>
<div id="contentContainer">
<div id="fullContainer">
<div id="stretchCrumbs">
<a href="/index.php">Home</a>
&#187; <a class="high" href="/distributors/">Distributors</a>
</div>
<h1>Distributors</h1>
<p>Search for DICKEY-john distributers by specifying any combonation of the<br />
following classifications: industry, product category, product, and state.</p>
<br />

<br />




<h2>North America</h2>

  <table class="setTbl listTbl" width="90%" cellpadding="0" cellspacing="0" border="0">
    <tr><td>Industry:</td><td>
    <select name="industry" id="center" onchange="javascript:document.centerform.submit()">
      <option value="">Select an Industry...</option>
      <?php do { ?>
      <option value="<?php echo $row_rs_industry['industry_name']; ?>"><?php echo $row_rs_industry['industry_name']; ?></option>
     
      <?php } while ($row_rs_industry = mysql_fetch_assoc($rs_industry)); ?></td></tr>
        </select>
    <tr><td width="125">Product Category: </td>  <td>
    <select name="prodcat" id="center" onchange="javascript:document.centerform.submit()">
      <option value="">Select a product category...</option>
      <?php do { ?>
      <option value="<?php echo $row_rs_productcategory['productCat_name']; ?>"><?php echo $row_rs_productcategory['productCat_name']; ?></option>
     
      <?php } while ($row_rs_productcategory = mysql_fetch_assoc($rs_productcategory)); ?></td></tr>
        </select>
    <tr>
    <td>Product:</td><td>
    <select name="prod" id="center" onchange="javascript:document.centerform.submit()">
      <option value="">Select a product...</option>
      <?php do { ?>
      <option value="<?php echo $row_rs_product['products_name']; ?>"><?php echo $row_rs_product['products_name']; ?></option>
      <?php } while ($row_rs_product = mysql_fetch_assoc($rs_product)); ?>
      </td></tr>
        </select>
    <td>State:</td>
          <td> <select name="state" id="center" onchange="javascript:document.centerform.submit()">
      <option value="">Select a state...</option>
      <?php do { ?>
      <option value="<?php echo $row_rs_state['state']; ?>"><?php echo $row_rs_state['state']; ?></option>
      <?php } while ($row_rs_state = mysql_fetch_assoc($rs_state)); ?>
      </td></tr>
        </select></td>
      </tr>
    <tr><td>&nbsp;</td><td><input class="PythonButton" type="submit" value="Find" name="{Button_Name}"></td></tr>
          </table>
    </form>

<br />
<h2>Outside North America </h2>
<table class="setTbl listTbl" width="90%" cellpadding="0" cellspacing="0" border="0">
<tr><td>  <select name="outna" id="center" onchange="javascript:document.centerform.submit()">
      <option value="">Select a country...</option>
      <?php do { ?>
      <option value="<?php echo $row_rs_ousidena['name']; ?>"><?php echo $row_rs_outsidena['name']; ?></option>
      <?php } while ($row_rs_outsidena = mysql_fetch_assoc($rs_outsidena)); ?>
      </td></tr>
      </select></td>
    </tr></td></tr>
      </table>
</form>
</div>
</div>
<?php include("_inc/footer.inc"); ?>
</body>
</html>
<?php
mysql_free_result($rs_industry);

mysql_free_result($rs_productcategory);

mysql_free_result($rs_product);

mysql_free_result($rs_outsidena);

mysql_free_result($rs_state);
?>

[/code]
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