Faster connection with MySQL?

[Sunny]

I have a following problem.I'm working on a small browser based game, and I added movement with keyboard keys.It is working, but now I want to add a code, which will send the current position of player to the MySQL database.The problem is, when I push the button, for example W, my character keeps moving upward, and every step he sends a data to MySQL, creating a looooong list of PHP requests.How can I speed up this process?Here is the part of code I use:\[code\]if (key == key_W) { // Player Upif (parseFloat(wzr.style.top)-6 < 0){ $('#wzro').stop().animate({ top: 342 }, 0, function() { $('#wzro').empty(); });YWalk();}else{ $('#wzro').stop().animate({ top: '-=6' }, 0, function() { $('#wzro').empty(); });YWalk();}}function YWalk(){ var wzr = document.getElementById("wzro"); var xmlHttp; if (window.XMLHttpRequest){ xmlHttp=new XMLHttpRequest(); } else{ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlHttp.open("GET","datachodzeniey.php?y="+ wzr.style.top); xmlHttp.send(null);}\[/code\]And in datachodzeniey.php:\[code\]<?phpsession_start();$username = $_SESSION['username'];$y=$_GET['y'];$connect = mysql_connect("localhost", "root", "");$select_db = mysql_select_db("testdb", $connect);$q=mysql_query("update players set y='$y' where dispname='$username'");?>\[/code\]