php - Link to internal Javascript not working -

i have thoroughly searched similar case before opening couldn't found answer.

scenario: trying create list of links internal js function set input of form , post php page responsible rendering graphs. each link pass different parameter (namely cidr address) said function.

problem: links correctly created and, if hover on them, see right parameter being passed but... function won't work. it's not logic within it, seems not being called @ all. if put simple alert("test"); inside it, function not executed.

question: considering below code, can cause this?

    <script type="text/javascript">                function getgraph(ip){               document.getelementbyid('graph').ipaddr.value = ip;               document.getelementbyid('graph').submit();             }      </script>          ...      <form id="graph" target="_blank" action="./graphs.php" method="post">           <input type="hidden" name="ipaddr" value="">     </form>      ...      <?php      ($row_no = $ev_ips->num_rows - 1; $row_no >= 0; $row_no--) {          $ev_ips->data_seek($row_no);          $row = $ev_ips->fetch_assoc();          $cidr = long2ip((float)$row['ip'])."/".$row['netmask'];          $cidrlink = "<a href=\"javascript:getgraph(".$cidr.");\">".$cidr."</a>";          $dest_ips = $dest_ips.$cidrlink.", ";     }      ?>      ...      <?php echo rtrim($dest_ips,", "); ?>