Javascript With Php Select Box

its about redirection using javascript when the select box is being invoke onChange command is being change it should be able to redirect that page dynamically~~ tq
PHP Code:
<?php

echo "<select name="navi" ONCHANGE="submit();">";
echo "<option value=&#391;'>hi</option>";
echo "<option value=&#392;'>hoi</option>";
echo "</select>";

echo "<script language='JavaScript'>";
echo "function submit(){";
echo "if(document.document1.navi.options[0].selected){";
echo "window.location='seek_data.php'}";
echo "}"; //if
echo "</script>";
?>