PHP GET参数

Question

I got index.php where i want to insert a predefined language option

<?php

if( isset( $_GET['target'] ) )
    $target = $_GET['target'];
else
    $target = "productie";

if ( isset( $_GET['language']))
    $language = $_GET['language'];
else {
    $language = "ro";
}
?>

in the same file (index.php) calling a frame with the menu

<FRAME noResize marginHeight=0 src="files/menu.php?target='<?=$target?>'&language='<?=$language?>'" name=leftFrame marginWidth=0>

in the menu.php I want to use a dropdown menu with the language options but first i am trying to forward the predefined language option from my index.php to any of my webpage in the index.php i got this code related to the language variable

<?php

if ( isset( $_GET['language']))
    $language = $_GET['language'];
else {
    $language = "ro";
} ?>

i tried also from the menu.php to hardcode the language parameter

<TD vAlign=top height="2%" valign="top" <?php if( $_GET['target'] == 'productie' ) echo " bgcolor=\"#A0A0A0\" ";?>>&nbsp;&nbsp;&nbsp;<a href="../index.php?target=productie&language=ro" target="_parent">Raport productie</a></TD></TR>

but when i go in my productie.php and insert a

print_r($_GET);

i see only the target variable

Array ( [target] => productie )

what i am missing?