Pop up Confirm Box

Anon

I have a HTML web page which is displaying information about a member I wish to delete from my database.
At the bottom of the page is a "Submit" button which the user selects to confirm that the member displayed is the one he wishes to delete. I then call a few PHP functions which does the delete then returns the user back to the home page. In between calling the PHP functions and transfering the user back to the home page, I want to display a Windows type POP_UP box which says "User has been Deleted". The user would then click okay and return to the home page.
Anyone got any ideas how I build the windows pop up box...?

Anon

<?php
if(isset($what) && $what=="delete"){

 	// do your deletings in php
	// ...

	// after this print out some JavaScript code that pops up an alert box
	// and redirects to some file
    echo "<script language=JavaScript>\n";
	echo "    alert('user has been deleted');\n";
	echo "    location.href='somefile.php';\n";
	echo "</script>\n";
 }

<body>
<a href=<?=$PHP_SELF?>?what=delete>test delete</a>
</body>