ช่วยหน่อยค่ะ ผิดตรงไหนอ่ะคะ ขึ้นว่า Parse error: syntax error, unexpected '{', expecting '(' in

<?
    include('include/connectdb.php');
    if($_POST['l_type']=='member')
	$sql="select * from member where m_user='".$_POST['username']."' and m_password='".md5($_POST['password'])."'";
    else if($_POST['l_type']=='agency')
	$sql="select * from agency where a_user='".$_POST['username']."' and a_password='".md5($_POST['password'])."'";
    else
	header("Location: index.php?action=noselect");
    //echo $sql;
    $result=mysql_query($sql);
    $num_rows = mysql_num_rows($result);
    if($num_rows > 0){
	//session start
	@session_start();
	session_register("login");
	session_register("fname");
	session_register("lname");
	session_register("id");
	
	if($_POST['l_type']=='member'){
	    while($rows=mysql_fetch_array($result)){
			$fname=$rows['m_fname'];
			$id=$rows['m_id'];
	    }
	    $_SESSION["login"] = 'member';
	    $_SESSION["fname"] = $fname;
		$_SESSION["id"] = $id;
		header("Location: ../tour_new/member/info/welcome.php");
	}
	else if{
	    while($rows=mysql_fetch_array($result)){
			$fname=$rows['a_name'];
			$id=$rows['a_id'];
	    }
	    $_SESSION["login"] = 'agency';
	    $_SESSION["fname"] = $fname;
		$_SESSION["id"] = $id;
		header("Location: ../tour_new/agency/info/welcome.php");
	}
	else if{
		while($rows=mysql_fetch_array($result)){
			$fname=$rows['ad_name'];
			$id=$rows['ad_id'];
		}
		$_SESSION["login"] = 'admin';
	    $_SESSION["fname"] = $fname;
		$_SESSION["id"] = $id;
		header("Location: ../tour_new/backend/blogs/b-create.php");
    }
	
    }
    else{
		header("Location: login.php?action=false");
    }
?>