อยากการทำให้คำสั่ง Uploadไฟล์ สามารถอัพโหลดได้มากกว่า 1 mb

<form action="PageUploadToMySQL2.php" method="post" enctype="multipart/form-data" name="form1" id="form1">
<input type="file" name="filUpload" />
<input name="btnSubmit" type="submit" value="upload" />
</form> 

<?     
if(move_uploaded_file($_FILES["filUpload"]["tmp_name"],"../upload_research/files/".$_FILES["filUpload"]["name"]))   
{       
echo "Upload Complete....Please wait";         
$objConnect = mysql_connect("localhost","root","51123490124") or die("Error Connect to Database");        
$objDB = mysql_select_db("upload");    
$strSQL = "INSERT INTO files_research ";    
$strSQL .="(FilesName) VALUES ('".$_FILES["filUpload"]["name"]."')";   
$objQuery = mysql_query($strSQL);          
} 
 echo "<meta http-equiv='refresh' content='3;url=PageUploadToMySQL3.php'>" ; 
?> 

<?     
$objConnect = mysql_connect("localhost","root","51123490124") or die("Error Connect to Database");    
$objDB = mysql_select_db("upload");   
$strSQL = "SELECT * FROM files_research";    
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]"); 
while($objResult = mysql_fetch_array($objQuery))    
{ 
echo $objResult["FilesID"];
echo <a href="files/<?=$objResult["FilesName"];">$objResult["FilesName"]</a>;
echo <a href="del.php?FilesID=$objResult["FilesID"];"><img src="../../image/delete.jpg" width="20" height="20" /></a> //ลิ้งโค้ดลบไฟล์
} 
mysql_close($objConnect); 
?>

<? 
$objConnect = mysql_connect("localhost","root","51123490124") or die("Error Connect to Database");  
$objDB = mysql_select_db("upload"); 
$strSQL = "delete from files_research WHERE FilesID = '".$_GET["FilesID"]."' "; 
$objResult = mysql_query($strSQL);
echo "Delete File Complete....Please wait";    
echo "<meta http-equiv='refresh' content='2; url=PageUploadToMySQL3.php'>" ;
?>