Untitled

<body>


<form id="frm1" action="form_processor.php" method="post">
    Input number of the rows: <input type="text" value="" name="m">
    </form>
<script>
    function functionm(){
    var z1=document.forms["frm1"];
    var z2=z1.elements[0].value;
    alert(z2);
    }
</script>
    <button onclick="functionm()">Number of the rows: </button>

<?php
$a=$_POST['m'];
    $b=2;
echo "<table border='1'><br />";

for ($row = 0; $row < $a; $row ++) {
   echo "<tr>";

   for ($col = 1; $col <= $b; $col ++) {
        echo "<td>", ($col + ($row *$b)), "</td>";
   }

   echo "</tr>";
}

echo "</table>";

?>


</body>