php $_GET/$_POST

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PHP

MySQL

Hello!
I have a little problem with PHP- $_GET/$_POST

First I have a button:

<form action='index.php' method='post'>
<input type='submit' name='show' value='Make a post!'>
</form>

And then in php:

if ($_POST['show'])
{
//echoing out another button with the name, submit

echo "<form action='index.php' method='POST'>
<input type='submit' style='width: 175px;' name='submit' value='post'>
</form>"; //and some text boxes!

And then... This will upload the things that i wrote in some text boxes(which I didn't write here) to mysql:

if ($_POST['submit'])
{
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$date = date("Y-m-d");
$time = date("H:i:S");

 if ($name&&$email&&$message)
 {
 $querypost = mysql_query("INSERT INTO blog VALUES ('','$name','$email','$message','$date','$time')");
  echo "Please wait... <meta http-equiv='refresh' content='2'>";
 }
 else
  echo 'Please fill out all fields';
}

But its not working, and i can't find a reason to why?! The uploading (and everything else) is working when i don't have the "if ($_POST['show'])" .
Thank you!