รบกวนช่วยแนะนำการทำ popup หรือเปิด link หน้าใหม่จาก code ตัวอย่างหน่อยครับ

<?
session_start();
	if (session_is_registered("valid_uname") && session_is_registered("valid_pwd")) {
}else{
header('location:index.php');
exit();
}
require_once('connect/connect.php');
?>
<?php
//echo $txtfullname;
//echo $txtaddress;
	$my_date=date('Y-m-d');
//	echo $my_date;
	$pay_status='0';
	$delivery='0';
	$sql="insert into orders (or_date,c_id,pay_status,delive_status,c_fulname,c_adress,or_sum) values ('$my_date','$valid_uname','$pay_status','$delivery','$txtfullname','$txtaddress','$sum_toal'+100)";
	//echo $sql;
	mysql_query($sql,$conn);
	$order_id=mysql_insert_id();
	$Strsql="select * from temp_order where id='$valid_uname'";
	$Strresult=mysql_query($Strsql,$conn);
		while($Strdata=mysql_fetch_array($Strresult)){
			$pro_num=$proid[$Strdata['prod_id']];
		$Stsql="insert into order_detail (or_id,prod_id,quantity) values ($order_id,'$Strdata[prod_id]',$pro_num)";
		mysql_query($Stsql,$conn);
	}
	$sql="delete from temp_order where id='$valid_uname'";
	mysql_query($sql,$conn);
	
	$sql1="select * from orders where or_id='$order_id'";
	$result1=mysql_query($sql1,$conn);
	$rs1=mysql_fetch_array($result1);
	/*<input name="ord_id" type="hidden" id="ord_id" value="<? echo $rs1[or_id]; ?>">*/
	
	echo "<script language='javascript'>alert('บันทึกข้อมูลการสั่งซื้อแล้ว');</script>";
	echo "<a href=\"paymentlast.php?id=$rs1[or_id]\">";
	echo "<meta http-equiv='refresh' content='0;url=pay.php' />";
?>