Javascript dropdown to pass variable and call Ajax

[tdors]

Can't figure it out.  I have the full code below, but I'm trying to pull data out of mysql based on the value selected from a drop down box,

 

I have the

 

<select size='1' name='".$selectname."' class='".$dropstyle."' onchange='javascript:  MyAjaxRequest(\"ajmn\",\"/handle_xsmysqllook.php?state=changed\")'>

 

which is fine, and I know how get variables work, but when I want to add to the end - &sellid=<Drop Down Variable> 

 

Thanks in advance for any help!

 

 

 

function xselldropchange($selectname, $valueselected, $dropstyle)
#	$selectname - Name of the drop down box/"<Select>" to use
#	$valueselected - If specified, which id of the value to display
#	$dropstyle - Style of Dropdown box
#
#	$toecho - HTML Code to Echo Back
#	$detailquery - Query to get information
#
#
{
$toecho = NULL;

# Determine what the mysql query should be	
$dropquery = "SELECT incentive_id, incentive_name FROM incentive_list ORDER BY incentive_sort";

if ($dropquery <> NULL) {

	$dropresult = @mysql_query ($dropquery); // Run the query
	if ($dropresult) { // If this query ran okay

		$toecho .= "\n<select size='1' name='".$selectname."' class='".$dropstyle."' onchange='javascript:  MyAjaxRequest(\"ajmn\",\"/handle_xsmysqllook.php?state=changed\")'>\n";

		while ($detailrow = mysql_fetch_array($dropresult, MYSQL_NUM)) {

			$toecho .= "<option "; if ($detailrow[0] == $valueselected) {$toecho .= "selected ";} $toecho .= "value='".$detailrow[0]."'>".$detailrow[1]."</option>\n";

		}

		$toecho .= "</select>\n";

		mysql_free_result ($dropresult); // Free up the result (Good Practice)

	} else { // If Query was Null
	$toecho == "<select size='1' name='problem'><option value='0'>No Result $table query $dropquery</option></select>";
	}
} else { // If Query was Null
$toecho == "<select size='1' name='problem'><option value='0'>ERROR IN $table</option></select>";
}

return $toecho;
}