<?php
//@ get values
	include("student-wave-nn1-inc-connect.inc");
	// get the values from the ajax request...
	$name = $_POST["name"];
	$x = $_POST["x"];
	$y = $_POST["y"];
	// ... and update the coordinates (or create a new row if name does not exist)
	
	
//@ update
	
	/* Use this for older versions of mysql (though its not worth it, since performance is bad)...
	
	$name_exists = mysql_fetch_array(mysql_query("SELECT name FROM position WHERE name='$name'"));
	if ($name_exists)
		mysql_query("UPDATE position SET x='$x', y='$y' WHERE name='$name'");		
	else
		mysql_query("INSERT INTO position (x,y,name) VALUES ('$x','$y','$name')");
	
	*/
	
//@ query
	// use this for mysql-versions >= 4.1.0 instead, for better performance!
	mysql_query("INSERT INTO position (x,y,name) VALUES ('$x','$y','$name') ON DUPLICATE KEY UPDATE x='$x', y='$y'");
	exit();
	
	/*
		TODO remove inactive/old users from db.
	*/
?>