Hvorfor blir der ikke postet noget?

Hej

Jeg ´har lavet dette her, men når jeg laver en var_dump($_POST["vote"]), blir der ikke postet noget kan jeg se.
Hvad kan det skyldes?

print "<form action=\"" . $_SERVER['REQUEST_URI'] . "\" method=\"post\">";
               
                //print "<input type=\"image\" src=\"../../images/votebar.jpg\" name=\"vote\" onClick=\"this.form.submit()\">";
               
                print "<span><input type=\"image\" src=\"../../images/vote_0,5.jpg\" name=\"vote\" value=\"0,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_1,0.jpg\" name=\"vote\" value=\"1\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_1,5.jpg\" name=\"vote\" value=\"1,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_2,0.jpg\" name=\"vote\" value=\"2\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_2,5.jpg\" name=\"vote\" value=\"2,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_3,0.jpg\" name=\"vote\" value=\"3\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_3,5.jpg\" name=\"vote\" value=\"3,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_4,0.jpg\" name=\"vote\" value=\"4\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_4,5.jpg\" name=\"vote\" value=\"4,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_5,0.jpg\" name=\"vote\" value=\"5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_5,5.jpg\" name=\"vote\" value=\"5,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_6,0.jpg\" name=\"vote\" value=\"6\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_6,5.jpg\" name=\"vote\" value=\"6,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_7,0.jpg\" name=\"vote\" value=\"7\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_7,5.jpg\" name=\"vote\" value=\"7,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_8,0.jpg\" name=\"vote\" value=\"8\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_8,5.jpg\" name=\"vote\" value=\"8,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_9,0.jpg\" name=\"vote\" value=\"9\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_9,5.jpg\" name=\"vote\" value=\"9,5\" onClick=\"this.form.submit()\"></span>";
                print "<span><input type=\"image\" src=\"../../images/vote_10,0.jpg\" name=\"vote\" value=\"10\" onClick=\"this.form.submit()\"></span>";
               
               
                print "<input type=\"hidden\" name=\"picture_id\" value=\"" . $picture_id . "\">";
               
            print "</form>";