I got the same problem... I had two drop down list and required the web browser refresh for any change in selected items.
echo "<SELECT name='example' onChange='document.thisform.submit()'>";
($example == "") ? $o="selected" : $o="";
echo "<OPTION VALUE=0 $o> Welcome </option>"; //default
$query = "select a_field from table";
$example = mysql_query($query, $db);
mysql_fetch_array($example)) {
$blah = $row["blah"];
($example == $blah) ? $o="selected" : $o="";
echo "<option $o> $blah </option>";}
echo "</select> }
Someone supply me a way to refresh the screen? For any change of selected items?