thanks and kiss all
you guys help a lot....:)

i managed it by setting up a flag : msgignoreflag
when usr click the link,the href is linked to
$_server[request]&msgignoreflag
and the php script call the function only if the flag is set  :)


my code is like this
with msgignoreflag being the flag and the dec_msgnum the function i
would like to call
function print_body($nomsg = 0) {

        global $cookie;
        ?> <body bgproperties="fixed"> <?php
       // if(isset($_GET["msgignoreflag"]) {
          if($_GET["msgignoreflag"]==1) {
               dec_msgnum($cookie["usernum"]);
         }
        if( $msgnum = get_msgnum($cookie["usernum"]) && !$nomsg) {

                $msg = get_msg($cookie["id"], $msgnum);
                ?><table width=100% bgcolor=lightyellow>
                  <tr>
                  <td valign="top" nowrap="nowrap" width=25%><font
color="green"><?php echo $msg["id"]; ?></font> (<?php
                  echo ctime2($msg["time"]); ?>): </td>
                  <td align="left" valign="top" width=50%><?php echo
stripansi($msg["msg"]); ?></td>
                  <td align="right" valign="top" nowrap="nowrap"
width=15%>
                  <a href="<?php echo BBSCGI;
?>/bbssndmsg.php?reply=1&uid=<?php echo $msg["id"]; ?>">[回讯息]</a>
                  </td>
                  <td align="right" valign="top" nowrap="nowrap"
width=10%>
                  <a href="<?php echo $_SERVER['REQUEST_URI'];
?>&msgignoreflag=1">[忽略]</a>
                  </td>
                  </tr></table><?php
        }
}

thanks all you guys again
i appriciate your efforts to help me 
kisssssssssss :)


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