inserting records with ajax

I am using the following php file to insert the records in the database but it inserts it multiple times like if I want to enter in the first textbox 123456 in the database it will enter it as
1
12
123
1234
12345
123456
so it makes multiple records.
here is my php file.

<?php

if (isset($_GET['inputText']))

//echo strtoupper($_GET['inputText']);
$db = mysql_connect('localhost', 'root', 'password') or die("Couldn't connect to the database.");
mysql_select_db('ajax_test') or die("Couldn't select the database");

$sql = "insert into test (mytext) Values ('".$_GET['inputText']."')";
$qu = mysql_query($sql) or die ("Couldnt insert".mysql_error());

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
      <html xmlns="http://www.w3.org/1999/xhtml">
 
      <head>
 
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 
      <title>Ajax - PHP example</title>
 
      </head>
 
       
 
      <body>
 
     
 
      <script language="javascript" type="text/javascript">
 
      <!--
 
      // Get the HTTP Object
 
      function getHTTPObject(){
 
      if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");
 
      else if (window.XMLHttpRequest) return new XMLHttpRequest();
 
      else {
 
      alert("Your browser does not support AJAX.");
 
      return null;
 
      }
 
      }
 
       
 
      // Change the value of the outputText field
 
      function setOutput(){
 
      if(httpObject.readyState == 4){
 
      document.getElementById('outputText').value = httpObject.responseText;
 
      }
 
       
 
      }
 
       
 
      // Implement business logic
 
      function doWork(){
 
      httpObject = getHTTPObject();
 
      if (httpObject != null) {
 
      httpObject.open("GET", "upperCase.php?inputText=" +document.getElementById('inputText').value, true);
 
      httpObject.send(null);
 
      httpObject.onreadystatechange = setOutput;
 
      }
 
      }
 
       
 
      var httpObject = null;
 
 
      //-->
 
      </script>
 
       
 
      <form name="testForm">
 
      Input text: <input type="text" onkeyup="doWork();" name="inputText" id="inputText" />
       
 
      Output text: <input type="text" name="outputText" id="outputText" />
 
      </form>
 
      </body>
 
      </html>

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inserting records with ajax

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PHP Scripting Language

JavaScript

Asynchronous Javascript and XML (AJAX)

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