HOW THE IT CHECK THE MSG FUNCTION AFTER CLICK THE SUBMIT BUTTON

[shebbycs]

<?php

$db = mysql_connect("localhost", "root") or die("Could not connect."); //username and password

if(!$db) 

die("no db");

if(!mysql_select_db("simple",$db)){
if(!mysql_select_db("regis",$db)){//database name

	die("No database selected.");}}
$message=$_POST['message'];


  print "<form action='registration.php' method='post'onsubmit='return msg();'>";

  print "Your message:<br>";

  print "<textarea name='message' cols='40' rows='2'></textarea><br>";

  print "<a onClick=\"addSmiley('')\"><img src='smile.gif'></a> ";

  print "<a onClick=\"addSmiley('')\"><img src='blush.gif'></a> ";

  print "<a onClick=\"addSmiley('')\"><img src='images/wink.gif'></a> ";

  print "<input type='submit' name='submit' value='Set Name'></form>";

  print "<script language=\"Java Script\" type=\"text/javascript\">\n";

  print "function addSmiley(a)\n";

  print "{\n";

  print "document.form.message.value += a;";

  print "document.form.message.focus();\n";

  print "}\n";

  print "</script>\n";

  print "<br><br>";
?>

<script type="text/javascript">
<?php
  function msg(){

if(isset($_POST['submit'])) //if submit button push has been detected

{



   if(strlen($message)<1)

   {    
    // print "You did not input a message";
      echo"<SCRIPT LANGUAGE='javascript'>alert('You did not input a message')</SCRIPT>";

   }

   else

   {

      $message=strip_tags($message);

      $IP=$_SERVER["REMOTE_ADDR"]; //grabs poster's IP

      $checkforbanned="SELECT IP from admin where IP='$IP'";

      $checkforbanned2=mysql_query($checkforbanned) or die("Could not check for banned IPS");

      if(mysql_num_rows($checkforbanned2)>0) //IP is in the banned list

      {

         print "You IP is banned from posting.";

      }

     else
      
       if(strlen($message)>=1)
       {

         $message=strip_tags($message);
         echo("<SCRIPT LANGUAGE='JavaScript'>window.alert('$message')</SCRIPT>");
        // die("<meta http-equiv=\"refresh\" content=\"0; url=registration.php\">");
       }
        $message=$_POST['message'];
         $message=strip_tags($message);
     /*   if($_POST['username'] && $_POST['pass'])
       {

         $name = mysql_query("SELECT * FROM Persons");
         $thedate = date("U"); //grab date and time of the post

         $insertmessage="INSERT into mesej (name,IP,postime,message) values('$name','$IP','$thedate','$message')";

         mysql_query($insertmessage) or die("Could not insert message");

        }     */

   }
}
return false;
}
return true;
</script>
?>

 

 

 

This is my code in my submit2.php im clicked submit button but if it is empty it should return an javascript alert error but why it directs through registration.php without reading the rules?

[trq]

Javascript executes on the client, while php executes on the server. See the problem with your code?