I am trying to combine an if statement with a case statement which is needed to determine which submit button the user has clicked on the form from the previous page.

The form page

Code:
<FORM ACTION="ordersearchresults.php" METHOD="GET" NAME="frmSearchCriteria">

<table class="searchtable">
                      <tr>
                         <td class="leftside">Choose Category :</td>
<td>
<select name="type">
<option value="ordernumber">OrderNumber</option>
<option value="partnumber">PartNumber</option>
<option value="accountname">AccountName</option>
</select>
</td>
</tr>

<tr>
                         <td class="leftside">Enter Keyword:</td>
<td><input type="text" name="keyword"></td>
</tr>

<tr>

<td class="leftside"><INPUT TYPE="Submit" name="exact match" VALUE="Exact Match"></td>
<td class="leftside"><INPUT TYPE="Submit" name="contains" VALUE="Contains"></td>
</tr>
</FORM>

The following page is where I am getting my error

Code:
<?php


require_once('databaseconnection.php'); 

$keywordentered = $_GET['keyword']; 
 
switch($_GET['type']) {
  case 'ordernumber':
  if ($_GET['contains']) {
     $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Order_No LIKE '".$keywordentered."%'"); }
	 else {
	 $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Order_No LIKE $keywordentered" ); }
    break;
  case 'partnumber':
   if ($_GET['contains']) {
     $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Part_No LIKE '".$keywordentered."%'"); }
	 else {
	 $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Part_No LIKE $keywordentered"); }
    break;
  case 'accountname':
    if ($_GET['contains']) {
     $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Account_Name LIKE '".$keywordentered."%'"); }
	 else
	 $result = odbc_exec($odbc, "SELECT * FROM orderpartnumbertable WHERE Account_Name LIKE $keywordentered" ); 
    break;
}

echo '<table class="table">';
echo '<tr><th>Order Number</th><th>Part Number</th><th>Part Description</th><th>Order Quantity</th><th>Order Date</th><th>Account Name</th><th>More Info</th></tr>';
while (($row = odbc_fetch_array($result)) !== false) {
echo '<tr>';
echo '<td>' . $row['Order_No'] . '</td>';
echo '<td>' . $row['Part_No'] . '</td>';
echo '<td>' . $row['Part_Description'] . '</td>';
echo '<td>' . $row['Order_Qty'] . '</td>';
echo '<td>' . $row['Order_Date'] . '</td>';
echo '<td>' . $row['Account_Name'] . '</td>';
echo '<td>' . '<a href="ordersearchdetails.php?fnp_site=' . rawurlencode($row['FNP_Site']) . '">More Info</a>' . '</td>'; 
echo '</tr>';
}
echo '</table>'; 
?>
The lines in red are where the error is occurring and here is the error
Code:
Warning: odbc_exec() [function.odbc-exec]: SQL error: [Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1., SQL state 07001 in SQLExecDirect in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\swiftdist\ordersearch\ordersearchresults.php on line 30
This relates to the first red line but the second red line brings up the same error.