title: display alert when form is submitted
body: <p>I need to display the alert saying thanx your msg is received but this doesnot works so please hel me out how to do.Is there coding error or what i coudnt get to it.i would pe pleased if someone helps me out.thankyou</p>
  
  <pre><code> &lt;h4&gt;Send Your Feedback Here.&lt;p&gt;
  
        &lt;form name ="register" action="contact.php" method="post"    enctype="multipart/form-data"&gt;
  
            Name&lt;br&gt;
            &lt;input type="text" name="name" size="30"&gt;
          &lt;/p&gt;
          &lt;p&gt;
          Email&lt;br&gt;
          &lt;input type="text" name="email" size="30"&gt;&lt;/p&gt;&lt;p&gt;
           Message&lt;br&gt;
          &lt;textarea name="message" rows="5" cols="40"&gt;&lt;/textarea&gt;
          &lt;p&gt;
  
          &lt;/p&gt;          
          &lt;p&gt;
          Security Check&lt;br&gt;
  
              Sum of &lt;?php $a = rand(0,9);
                          $b = rand(0,9); 
                          echo $a . "+" . $b ; 
                          $result = $a + $b ;
                          ?&gt;  =       
              &lt;input type="text" name="ver"  /&gt;&lt;input type="hidden" name="rval" value="&lt;?php echo $result; ?&gt;" /&gt;
            &lt;button type="button" onClick="validate()"&gt;Send&lt;/button&gt;
          &lt;/p&gt;
        &lt;/form&gt;
  
  
  &lt;script type="text/javascript"&gt;
          function validate()
      {
          var x = document.register.ver.value;
          var y = document.register.rval.value;
          var nameCheck = document.register.name.value, 
          emailCheck = document.register.email.value, 
          msgCheck = document.register.message.value;
  
      var msg ="";
      if(x!=y)
      {
      msg+= "Sorry!! Captcha Mismached."+"\n";
      }
      if(nameCheck=="")
      {
          msg+= "Dont you have a name????"+"\n";
      }
      if(emailCheck=="")
      {
          msg+= "Enter email... how am I supposed to contact you"+"\n";
      }
      if(msgCheck="")
      {
          msg+= "Dont you have any messages for me??"+"\n";
      }   
  
      if(msg!="")
      {
      alert(msg);
      }
  
      else
      {
              &lt;?php
  //Get message data.
  $name = $_POST['name'];
  $message = $_POST['message'];
  $email=$_POST['email'];
  $ver = $_POST['ver'];  
  $rval = $_POST['rval'];
  
  if($ver==$rval)
  {
  //Email it.
  mail(
    'example@example.com',  //Where to send
  "Contact form - $name", //Email subject
    $message,               //Message body
    $email                    //email address  
  );
  echo "&lt;script type=\"text/javascript\"&gt;alert('Thank you form is submitted');&lt;/script&gt;";
      }
  else
  {
       echo "&lt;script type=\"text/javascript\"&gt;alert('Wrong captcha');&lt;/script&gt;";
  }
  
  ?&gt;
  
      }
  }
  </code></pre>
  
  <p></p>