รบกวนดูโค้ดการเปิดหน้า windows ใหม่ แล้วปิดหน้า windows เก่า

<?php ob_start();?>
<?php
	session_start();
	include("connect.php");
	$strSQL = "SELECT * FROM user WHERE USERNAME = '".trim($_POST['txtusername'])."' 
	and PASSWORD = '".trim($_POST['txtpass'])."'";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if(!$objResult)
	{
			header("location:log_in.php");
	}
	else
	{
			//echo $_SESSION["USERNAME"] = $objResult["USERNAME"];
			//echo $_SESSION["STATUS"] = $objResult["STATUS"];

			session_write_close();
			
			if($objResult["STATUS"] == "admin")
			{
				//header("location:sticker_add.php");
				echo "<script language=javascript>windows.close()window.open('sticker_add.php','','width=770,height=700,top=120,left=250');</script>" ;
				
		
			}
			else
			{
				header("location:PaymentVendor.php");
			}
			
			
	}