Stumped on Refreshing

[artisticre]

I have some code that populates a dropdown box with tshirt names and when a user selects one and clicks go, it deletes the tshirt. Is there a way to repopulate the dropdown after delete instead of refreshing the page each time?

<?php
$connection = mysql_connect("xxx","xxx","xxx") or die("No Connection");
$db = mysql_select_db("xxx", $connection) or die("No Database");

$shirtsql = "SELECT distinct shirtname from tshirts ORDER BY shirtname ASC";
$shirtsql_result = mysql_query($shirtsql,$connection)
or die("Couldn't execute query.");

while ($row = mysql_fetch_array($shirtsql_result)) {

$shirtname = $row["shirtname"];
$CatList.= "<OPTION value=\"$shirtname\">$shirtname</OPTION>";

}
?>

<?php

if ($_POST[submit])

{

$connection = mysql_connect("xxx","xxx","xxx") or die("Couldn't make connection.");

$db = mysql_select_db("xxx", $connection) or die("Couldn't select database.");

$query = "SELECT catID FROM tshirts where shirtname = '$DelShirt'";
$result = MySQL_query($query);

While( $rows = MySQL_fetch_array($result) ) {
$catid = $rows['catID'];

}
$query = "DELETE from category where catID = '$catid'";
$result = MYSQL_query($query);
$query = "DELETE from tshirts where shirtname = '$DelShirt'";
$result = MYSQL_query($query);
echo "T-Shirt Deleted";
}
?>

<form method="post" action="<?PHP echo $PHP_SELF?>">
<SELECT name="DelShirt" style="color : #ffffff; background-color : #A59ACF; font : bold; letter-spacing : 0px" size="10">
<option value=\"\" name=DelShirt>Available T-Shirts</option>";
<? echo "$CatList"; ?>
</SELECT>
<input type="Submit" name="submit" value="Go">
</form>
<br><br>

</body>
</html>

[Pig]

move the delete portion of the code above the part that populates the drop down box.

[PyroX]

<? 
$connection = mysql_connect("xxx","xxx","xxx") or die("No Connection"); 
$db = mysql_select_db("xxx", $connection) or die("No Database"); 

if ($_POST['submit']) 
{ 

$query = "SELECT catID FROM tshirts where shirtname = '$DelShirt'"; 
$result = MySQL_query($query); 

    While( $rows = MySQL_fetch_array($result) ) { 
    $catid = $rows['catID']; 
    } 

$query = "DELETE from category where catID = '$catid'"; 
$result = MYSQL_query($query); 
$query = "DELETE from tshirts where shirtname = '$DelShirt'"; 
$result = MYSQL_query($query); 
echo "T-Shirt Deleted"; 
} 

$shirtsql = "SELECT distinct shirtname from tshirts ORDER BY shirtname ASC"; 
$shirtsql_result = mysql_query($shirtsql,$connection) 
or die("Couldn't execute query."); 

while ($row = mysql_fetch_array($shirtsql_result)) { 
$shirtname = $row["shirtname"]; 
$CatList.= "<OPTION value=\"$shirtname\">$shirtname</OPTION>"; 
} 
?> 

<form method="post" action="<?PHP echo $PHP_SELF?>"> 
<SELECT name="DelShirt" style="color : #ffffff; background-color : #A59ACF; font : bold; letter-spacing : 0px" size="10"> 
<option value=\"\" name=DelShirt>Available T-Shirts</option>"; 

<?=$CatList?> 

</SELECT> 
<input type="Submit" name="submit" value="Go"> 
</form> 
<br><br> 
</body> 
</html>