How to get a vlaue of Dropdown and Input files ?

<td width="225" align="left"><select id="month" name="month" >
<option selected="selected" value="">----Month----</option>
<option value="January">January</option>
<option value="February">February</option>
<option value="March">March </option>
<option value="April">April</option>
<option value="May">May</option>
<option value="June">June </option>
<option value="July">July</option>
<option value="August">August</option>
<option value="September">September </option>
<option value="October">October</option>
<option value="November">November</option>
<option value="December">December </option>
</select>
</td>
text fox.
<td width="80%" align="left"  ><input id="name" name="name" disabled="disabled" type="text" value="abc" style="width:200px;"/></td>

<form enctype="multipart/form-data" action="<?php echo $_SERVER['PHP_SELF'];?>" method="post"><td align="right"><label for="file1">Attache File</label> <input type="file" name="file" id="file"><input type="submit" Value="Send For Approval" id="mail" name="mail" /></td></tr></table></form>

<?php
    if(isset($_POST['mail']))
    {
	 $month=$_GET['month'];// not by this
    $month=$_POST['month'];// not by this

	echo "<script>alert($month);</script>";
    	
    }
?>