การแจ้งเตือนการ upload multiple file ครับ มีปัญหานิดหน่อย ช่วยแนะนำที

$max_file_size  = 20971520;

$ini_max = str_replace('M', '', ini_get('upload_max_filesize'));
$upload_max = $ini_max * 1024 * 1024;


if($_FILES["filUpload"]["size"][0] > $max_file_size && $_FILES["filUpload"]["size"][1] > $max_file_size && $_FILES["filUpload"]["size"][2] > $max_file_size)
{
		echo "<script>alert('File size exceeds $max_file_size limit!')</script>";
		echo "<script>window.top.window.showResult('2');</script>";
		echo "<script>window.location='UploadForm.php'</script>";
}
elseif($_FILES["filUpload"]["size"][0] > $upload_max || $_FILES["filUpload"]["size"][1] > $upload_max || $_FILES["filUpload"]["size"][2] > $upload_max)
{
		echo "<script>alert('File size exceeds $upload_max php.ini limit!')</script>";
		echo "<script>window.top.window.showResult('2');</script>";
		echo "<script>window.location='UploadForm.php'</script>";
}		
elseif($_FILES["filUpload"]["error"][0] != 0 or $_FILES["filUpload"]["error"][1] != 0 or $_FILES["filUpload"]["error"][2] != 0 )
{
		echo "<script>alert('Error Uploaded File!')</script>";
		echo "<script>window.top.window.showResult('2');</script>";
		echo "<script>window.location='UploadForm.php'</script>";
}